diff --git a/docs/libcurl/opts/CURLOPT_ABSTRACT_UNIX_SOCKET.md b/docs/libcurl/opts/CURLOPT_ABSTRACT_UNIX_SOCKET.md
index 10db90f3cd..d13cf7c180 100644
--- a/docs/libcurl/opts/CURLOPT_ABSTRACT_UNIX_SOCKET.md
+++ b/docs/libcurl/opts/CURLOPT_ABSTRACT_UNIX_SOCKET.md
@@ -54,11 +54,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_ABSTRACT_UNIX_SOCKET, "/tmp/foo.sock");
     curl_easy_setopt(curl, CURLOPT_URL, "http://localhost/");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_ACCEPTTIMEOUT_MS.md b/docs/libcurl/opts/CURLOPT_ACCEPTTIMEOUT_MS.md
index 5dd19a708b..41e43df9e5 100644
--- a/docs/libcurl/opts/CURLOPT_ACCEPTTIMEOUT_MS.md
+++ b/docs/libcurl/opts/CURLOPT_ACCEPTTIMEOUT_MS.md
@@ -48,12 +48,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/path/file");
 
     /* wait no more than 5 seconds for the FTP server to connect */
     curl_easy_setopt(curl, CURLOPT_ACCEPTTIMEOUT_MS, 5000L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_ACCEPT_ENCODING.md b/docs/libcurl/opts/CURLOPT_ACCEPT_ENCODING.md
index 6979b26804..61f28e6e61 100644
--- a/docs/libcurl/opts/CURLOPT_ACCEPT_ENCODING.md
+++ b/docs/libcurl/opts/CURLOPT_ACCEPT_ENCODING.md
@@ -106,13 +106,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* enable all supported built-in compressions */
     curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_ALTSVC.md b/docs/libcurl/opts/CURLOPT_ALTSVC.md
index 0b2a9cad72..c4058a4039 100644
--- a/docs/libcurl/opts/CURLOPT_ALTSVC.md
+++ b/docs/libcurl/opts/CURLOPT_ALTSVC.md
@@ -64,9 +64,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, CURLALTSVC_H1);
     curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.md b/docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.md
index cdf9ec44a4..22dac41c85 100644
--- a/docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.md
+++ b/docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.md
@@ -84,9 +84,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, CURLALTSVC_H1);
     curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_APPEND.md b/docs/libcurl/opts/CURLOPT_APPEND.md
index a90222d670..ff20406c51 100644
--- a/docs/libcurl/opts/CURLOPT_APPEND.md
+++ b/docs/libcurl/opts/CURLOPT_APPEND.md
@@ -44,12 +44,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
-
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/to/newfile");
     curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
     curl_easy_setopt(curl, CURLOPT_APPEND, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_AWS_SIGV4.md b/docs/libcurl/opts/CURLOPT_AWS_SIGV4.md
index 286e9d5eea..2f17a201c3 100644
--- a/docs/libcurl/opts/CURLOPT_AWS_SIGV4.md
+++ b/docs/libcurl/opts/CURLOPT_AWS_SIGV4.md
@@ -88,6 +88,7 @@ int main(void)
   CURL *curl = curl_easy_init();
 
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL,
                     "https://service.region.example.com/uri");
     curl_easy_setopt(curl, CURLOPT_AWS_SIGV4, "provider1:provider2");
@@ -98,7 +99,8 @@ int main(void)
                      "provider1:provider2:region:service");
 
     curl_easy_setopt(curl, CURLOPT_USERPWD, "MY_ACCESS_KEY:MY_SECRET_KEY");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_CAINFO.md b/docs/libcurl/opts/CURLOPT_CAINFO.md
index 4e94bbf54b..8618367728 100644
--- a/docs/libcurl/opts/CURLOPT_CAINFO.md
+++ b/docs/libcurl/opts/CURLOPT_CAINFO.md
@@ -69,9 +69,10 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
     curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/certs/cabundle.pem");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
   }
 }
diff --git a/docs/libcurl/opts/CURLOPT_CA_CACHE_TIMEOUT.md b/docs/libcurl/opts/CURLOPT_CA_CACHE_TIMEOUT.md
index d28529a212..af677d8b14 100644
--- a/docs/libcurl/opts/CURLOPT_CA_CACHE_TIMEOUT.md
+++ b/docs/libcurl/opts/CURLOPT_CA_CACHE_TIMEOUT.md
@@ -60,17 +60,17 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
-    CURLcode res;
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
 
     /* only reuse certificate stores for a short time */
     curl_easy_setopt(curl, CURLOPT_CA_CACHE_TIMEOUT, 60L);
 
-    res = curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* in this second request, the cache is not used if more than
        sixty seconds passed since the previous connection */
-    res = curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     curl_easy_cleanup(curl);
   }
diff --git a/docs/libcurl/opts/CURLOPT_CLOSESOCKETDATA.md b/docs/libcurl/opts/CURLOPT_CLOSESOCKETDATA.md
index a1bdd9c3fe..4fc4a9f8d8 100644
--- a/docs/libcurl/opts/CURLOPT_CLOSESOCKETDATA.md
+++ b/docs/libcurl/opts/CURLOPT_CLOSESOCKETDATA.md
@@ -62,13 +62,15 @@ int main(void)
 {
   struct priv myown;
   CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode result;
+    /* call this function to close sockets */
+    curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket);
+    curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &myown);
 
-  /* call this function to close sockets */
-  curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket);
-  curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &myown);
-
-  curl_easy_perform(curl);
-  curl_easy_cleanup(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
 }
 ~~~
 
diff --git a/docs/libcurl/opts/CURLOPT_CLOSESOCKETFUNCTION.md b/docs/libcurl/opts/CURLOPT_CLOSESOCKETFUNCTION.md
index 7f1bf592dc..0dc9bb4c61 100644
--- a/docs/libcurl/opts/CURLOPT_CLOSESOCKETFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_CLOSESOCKETFUNCTION.md
@@ -73,13 +73,15 @@ int main(void)
 {
   struct priv myown;
   CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode result;
+    /* call this function to close sockets */
+    curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket);
+    curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &myown);
 
-  /* call this function to close sockets */
-  curl_easy_setopt(curl, CURLOPT_CLOSESOCKETFUNCTION, closesocket);
-  curl_easy_setopt(curl, CURLOPT_CLOSESOCKETDATA, &myown);
-
-  curl_easy_perform(curl);
-  curl_easy_cleanup(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+  }
 }
 ~~~
 
diff --git a/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT.md b/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT.md
index 61216a9055..65a98b315d 100644
--- a/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT.md
+++ b/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT.md
@@ -69,12 +69,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* complete connection within 10 seconds */
     curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT_MS.md b/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT_MS.md
index 10dd0751f0..e619e94507 100644
--- a/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT_MS.md
+++ b/docs/libcurl/opts/CURLOPT_CONNECTTIMEOUT_MS.md
@@ -70,12 +70,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* complete connection within 10000 milliseconds */
     curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT_MS, 10000L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_CONNECT_TO.md b/docs/libcurl/opts/CURLOPT_CONNECT_TO.md
index b93faaba6a..68bc1b6ad4 100644
--- a/docs/libcurl/opts/CURLOPT_CONNECT_TO.md
+++ b/docs/libcurl/opts/CURLOPT_CONNECT_TO.md
@@ -96,10 +96,11 @@ int main(void)
 
   curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_CONNECT_TO, connect_to);
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* always cleanup */
     curl_easy_cleanup(curl);
diff --git a/docs/libcurl/opts/CURLOPT_COOKIE.md b/docs/libcurl/opts/CURLOPT_COOKIE.md
index 17f8356657..4c47c1fdaf 100644
--- a/docs/libcurl/opts/CURLOPT_COOKIE.md
+++ b/docs/libcurl/opts/CURLOPT_COOKIE.md
@@ -76,11 +76,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_COOKIE, "tool=curl; fun=yes;");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_COOKIELIST.md b/docs/libcurl/opts/CURLOPT_COOKIELIST.md
index 66c2429171..ae7d650db3 100644
--- a/docs/libcurl/opts/CURLOPT_COOKIELIST.md
+++ b/docs/libcurl/opts/CURLOPT_COOKIELIST.md
@@ -92,6 +92,7 @@ int main(void)
 
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* my_cookie is imported immediately via CURLOPT_COOKIELIST. */
     curl_easy_setopt(curl, CURLOPT_COOKIELIST, my_cookie);
 
@@ -109,7 +110,7 @@ int main(void)
     */
     curl_easy_setopt(curl, CURLOPT_COOKIEJAR, "cookies.txt");  /* export */
 
-    curl_easy_perform(curl);  /* cookies imported from cookies.txt */
+    result = curl_easy_perform(curl); /* cookies imported from cookies.txt */
 
     curl_easy_cleanup(curl);  /* cookies exported to cookies.txt */
   }
diff --git a/docs/libcurl/opts/CURLOPT_COPYPOSTFIELDS.md b/docs/libcurl/opts/CURLOPT_COPYPOSTFIELDS.md
index 837fd2de1a..d7613f1247 100644
--- a/docs/libcurl/opts/CURLOPT_COPYPOSTFIELDS.md
+++ b/docs/libcurl/opts/CURLOPT_COPYPOSTFIELDS.md
@@ -62,6 +62,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     char local_buffer[1024]="data to send";
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
@@ -71,7 +72,8 @@ int main(void)
     /* send data from the local stack */
     curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, local_buffer);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_DEFAULT_PROTOCOL.md b/docs/libcurl/opts/CURLOPT_DEFAULT_PROTOCOL.md
index 9f85c6af05..1baf35ca05 100644
--- a/docs/libcurl/opts/CURLOPT_DEFAULT_PROTOCOL.md
+++ b/docs/libcurl/opts/CURLOPT_DEFAULT_PROTOCOL.md
@@ -68,6 +68,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* set a URL without a scheme */
     curl_easy_setopt(curl, CURLOPT_URL, "example.com");
 
@@ -75,7 +76,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_DISALLOW_USERNAME_IN_URL.md b/docs/libcurl/opts/CURLOPT_DISALLOW_USERNAME_IN_URL.md
index 7e85c2d36b..7435f98668 100644
--- a/docs/libcurl/opts/CURLOPT_DISALLOW_USERNAME_IN_URL.md
+++ b/docs/libcurl/opts/CURLOPT_DISALLOW_USERNAME_IN_URL.md
@@ -48,11 +48,12 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
-
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_DISALLOW_USERNAME_IN_URL, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_DNS_SHUFFLE_ADDRESSES.md b/docs/libcurl/opts/CURLOPT_DNS_SHUFFLE_ADDRESSES.md
index 2074fff87c..87d3fd82ef 100644
--- a/docs/libcurl/opts/CURLOPT_DNS_SHUFFLE_ADDRESSES.md
+++ b/docs/libcurl/opts/CURLOPT_DNS_SHUFFLE_ADDRESSES.md
@@ -56,10 +56,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_DNS_SHUFFLE_ADDRESSES, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* always cleanup */
     curl_easy_cleanup(curl);
diff --git a/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYHOST.md b/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYHOST.md
index 3feee962e4..0d2c26f2de 100644
--- a/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYHOST.md
+++ b/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYHOST.md
@@ -69,6 +69,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_DOH_URL,
@@ -77,7 +78,8 @@ int main(void)
     /* Disable hostname verification of the DoH server */
     curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYHOST, 0L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYPEER.md b/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYPEER.md
index 5c2860d57b..5c36f3db88 100644
--- a/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYPEER.md
+++ b/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYPEER.md
@@ -81,6 +81,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_DOH_URL,
@@ -89,7 +90,8 @@ int main(void)
     /* Disable certificate verification of the DoH server */
     curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYPEER, 0L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYSTATUS.md b/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYSTATUS.md
index 01f5894aa7..85d12440c4 100644
--- a/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYSTATUS.md
+++ b/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYSTATUS.md
@@ -56,6 +56,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_DOH_URL,
@@ -64,7 +65,8 @@ int main(void)
     /* Ask for OCSP stapling when verifying the DoH server */
     curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYSTATUS, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_DOH_URL.md b/docs/libcurl/opts/CURLOPT_DOH_URL.md
index 76d80bbb79..1c463f13ca 100644
--- a/docs/libcurl/opts/CURLOPT_DOH_URL.md
+++ b/docs/libcurl/opts/CURLOPT_DOH_URL.md
@@ -79,9 +79,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_DOH_URL, "https://dns.example.com");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_ECH.md b/docs/libcurl/opts/CURLOPT_ECH.md
index 0cb2d7e4fd..e409d58cec 100644
--- a/docs/libcurl/opts/CURLOPT_ECH.md
+++ b/docs/libcurl/opts/CURLOPT_ECH.md
@@ -96,8 +96,10 @@ int main(void)
     "ecl:AED+DQA87wAgACB/RuzUCsW3uBbSFI7mzD63TUXpI8sGDTnFTbFCDpa+" \
     "CAAEAAEAAQANY292ZXIuZGVmby5pZQAA";
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_ECH, config);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_EXPECT_100_TIMEOUT_MS.md b/docs/libcurl/opts/CURLOPT_EXPECT_100_TIMEOUT_MS.md
index a1f3fbae27..9dd330b055 100644
--- a/docs/libcurl/opts/CURLOPT_EXPECT_100_TIMEOUT_MS.md
+++ b/docs/libcurl/opts/CURLOPT_EXPECT_100_TIMEOUT_MS.md
@@ -46,12 +46,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* wait 3 seconds for 100-continue */
     curl_easy_setopt(curl, CURLOPT_EXPECT_100_TIMEOUT_MS, 3000L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_FNMATCH_DATA.md b/docs/libcurl/opts/CURLOPT_FNMATCH_DATA.md
index fe1818ea44..fd2660db69 100644
--- a/docs/libcurl/opts/CURLOPT_FNMATCH_DATA.md
+++ b/docs/libcurl/opts/CURLOPT_FNMATCH_DATA.md
@@ -62,12 +62,14 @@ int main(void)
   struct local_stuff local_data;
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.example.com/file*");
     curl_easy_setopt(curl, CURLOPT_WILDCARDMATCH, 1L);
     curl_easy_setopt(curl, CURLOPT_FNMATCH_FUNCTION, my_fnmatch);
     curl_easy_setopt(curl, CURLOPT_FNMATCH_DATA, &local_data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_FNMATCH_FUNCTION.md b/docs/libcurl/opts/CURLOPT_FNMATCH_FUNCTION.md
index b4abfb0dca..e0b220ccf1 100644
--- a/docs/libcurl/opts/CURLOPT_FNMATCH_FUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_FNMATCH_FUNCTION.md
@@ -71,11 +71,13 @@ int main(void)
   struct local_stuff local_data;
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.example.com/file*");
     curl_easy_setopt(curl, CURLOPT_WILDCARDMATCH, 1L);
     curl_easy_setopt(curl, CURLOPT_FNMATCH_FUNCTION, my_fnmatch);
     curl_easy_setopt(curl, CURLOPT_FNMATCH_DATA, &local_data);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_FOLLOWLOCATION.md b/docs/libcurl/opts/CURLOPT_FOLLOWLOCATION.md
index d8a1153ead..cc704576c4 100644
--- a/docs/libcurl/opts/CURLOPT_FOLLOWLOCATION.md
+++ b/docs/libcurl/opts/CURLOPT_FOLLOWLOCATION.md
@@ -138,12 +138,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* example.com is redirected, so we tell libcurl to follow redirection */
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_FORBID_REUSE.md b/docs/libcurl/opts/CURLOPT_FORBID_REUSE.md
index 729dcdc702..f7638eacc5 100644
--- a/docs/libcurl/opts/CURLOPT_FORBID_REUSE.md
+++ b/docs/libcurl/opts/CURLOPT_FORBID_REUSE.md
@@ -50,12 +50,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
+    CURLcode result2;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
     curl_easy_setopt(curl, CURLOPT_FORBID_REUSE, 1L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* this second transfer may not reuse the same connection */
-    curl_easy_perform(curl);
+    result2 = curl_easy_perform(curl);
 
     curl_easy_cleanup(curl);
   }
diff --git a/docs/libcurl/opts/CURLOPT_FRESH_CONNECT.md b/docs/libcurl/opts/CURLOPT_FRESH_CONNECT.md
index 0198a344f4..84257ff3c8 100644
--- a/docs/libcurl/opts/CURLOPT_FRESH_CONNECT.md
+++ b/docs/libcurl/opts/CURLOPT_FRESH_CONNECT.md
@@ -52,10 +52,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
     curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1L);
     /* this transfer must use a new connection, not reuse an existing */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
   }
 }
diff --git a/docs/libcurl/opts/CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS.md b/docs/libcurl/opts/CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS.md
index c4b29d876f..9136021c3a 100644
--- a/docs/libcurl/opts/CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS.md
+++ b/docs/libcurl/opts/CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS.md
@@ -106,10 +106,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* Set the timeout to 300 milliseconds */
     curl_easy_setopt(curl, CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS, 300L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* always cleanup */
     curl_easy_cleanup(curl);
diff --git a/docs/libcurl/opts/CURLOPT_HEADER.md b/docs/libcurl/opts/CURLOPT_HEADER.md
index d59e90bc04..ea513f5196 100644
--- a/docs/libcurl/opts/CURLOPT_HEADER.md
+++ b/docs/libcurl/opts/CURLOPT_HEADER.md
@@ -63,11 +63,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_HEADER, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HEADERDATA.md b/docs/libcurl/opts/CURLOPT_HEADERDATA.md
index f767961cdc..7df0f0d1e6 100644
--- a/docs/libcurl/opts/CURLOPT_HEADERDATA.md
+++ b/docs/libcurl/opts/CURLOPT_HEADERDATA.md
@@ -68,6 +68,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     struct my_info my = { 10, "the cookies are in the cupboard" };
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
@@ -76,7 +77,9 @@ int main(void)
     /* pass in custom data to the callback */
     curl_easy_setopt(curl, CURLOPT_HEADERDATA, &my);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.md b/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.md
index d435e27f44..e89ec887f2 100644
--- a/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_HEADERFUNCTION.md
@@ -118,11 +118,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, header_callback);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HSTS.md b/docs/libcurl/opts/CURLOPT_HSTS.md
index 1a9d811455..2dc0c457d6 100644
--- a/docs/libcurl/opts/CURLOPT_HSTS.md
+++ b/docs/libcurl/opts/CURLOPT_HSTS.md
@@ -86,8 +86,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_HSTS, "/home/user/.hsts-cache");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HSTSREADDATA.md b/docs/libcurl/opts/CURLOPT_HSTSREADDATA.md
index eda180e302..0b5174d8e1 100644
--- a/docs/libcurl/opts/CURLOPT_HSTSREADDATA.md
+++ b/docs/libcurl/opts/CURLOPT_HSTSREADDATA.md
@@ -48,18 +48,29 @@ struct MyData {
   void *custom;
 };
 
+static CURLSTScode hsts_cb(CURL *easy, struct curl_hstsentry *sts,
+                           void *clientp)
+{
+  /* populate the struct as documented */
+  return CURLSTS_OK;
+}
+
 int main(void)
 {
   CURL *curl = curl_easy_init();
   struct MyData this;
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
 
     /* pass pointer that gets passed in to the
        CURLOPT_HSTSREADFUNCTION callback */
     curl_easy_setopt(curl, CURLOPT_HSTSREADDATA, &this);
+    /* set HSTS read callback */
+    curl_easy_setopt(curl, CURLOPT_HSTSREADFUNCTION, hsts_cb);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HSTSREADFUNCTION.md b/docs/libcurl/opts/CURLOPT_HSTSREADFUNCTION.md
index b5a685b73b..259d2f0f26 100644
--- a/docs/libcurl/opts/CURLOPT_HSTSREADFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_HSTSREADFUNCTION.md
@@ -90,6 +90,8 @@ int main(void)
     struct priv my_stuff;
     CURLcode result;
 
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
     /* set HSTS read callback */
     curl_easy_setopt(curl, CURLOPT_HSTSREADFUNCTION, hsts_cb);
 
diff --git a/docs/libcurl/opts/CURLOPT_HSTSWRITEDATA.md b/docs/libcurl/opts/CURLOPT_HSTSWRITEDATA.md
index 6be5582dbe..cc078539dd 100644
--- a/docs/libcurl/opts/CURLOPT_HSTSWRITEDATA.md
+++ b/docs/libcurl/opts/CURLOPT_HSTSWRITEDATA.md
@@ -53,13 +53,15 @@ int main(void)
   CURL *curl = curl_easy_init();
   struct MyData this;
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
 
     /* pass pointer that gets passed in to the
        CURLOPT_HSTSWRITEFUNCTION callback */
     curl_easy_setopt(curl, CURLOPT_HSTSWRITEDATA, &this);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HSTS_CTRL.md b/docs/libcurl/opts/CURLOPT_HSTS_CTRL.md
index e432fc4edc..7445b154b7 100644
--- a/docs/libcurl/opts/CURLOPT_HSTS_CTRL.md
+++ b/docs/libcurl/opts/CURLOPT_HSTS_CTRL.md
@@ -64,8 +64,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
+    /* enable HSTS */
     curl_easy_setopt(curl, CURLOPT_HSTS_CTRL, CURLHSTS_ENABLE);
-    curl_easy_perform(curl);
+    /* specify where to store the HSTS cache */
+    curl_easy_setopt(curl, CURLOPT_HSTS, "/home/user/.hsts-cache");
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HTTP200ALIASES.md b/docs/libcurl/opts/CURLOPT_HTTP200ALIASES.md
index 0a7a729799..daf0b06b16 100644
--- a/docs/libcurl/opts/CURLOPT_HTTP200ALIASES.md
+++ b/docs/libcurl/opts/CURLOPT_HTTP200ALIASES.md
@@ -61,14 +61,16 @@ int main(void)
   CURL *curl = curl_easy_init();
   if(curl) {
     struct curl_slist *list;
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     list = curl_slist_append(NULL, "ICY 200 OK");
     list = curl_slist_append(list, "WEIRDO 99 FINE");
 
     curl_easy_setopt(curl, CURLOPT_HTTP200ALIASES, list);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
     curl_slist_free_all(list); /* free the list again */
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HTTPGET.md b/docs/libcurl/opts/CURLOPT_HTTPGET.md
index 36704ae249..aba51f1465 100644
--- a/docs/libcurl/opts/CURLOPT_HTTPGET.md
+++ b/docs/libcurl/opts/CURLOPT_HTTPGET.md
@@ -52,13 +52,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* use a GET to fetch this */
     curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HTTPHEADER.md b/docs/libcurl/opts/CURLOPT_HTTPHEADER.md
index c7a705bedc..2c9ed039c7 100644
--- a/docs/libcurl/opts/CURLOPT_HTTPHEADER.md
+++ b/docs/libcurl/opts/CURLOPT_HTTPHEADER.md
@@ -169,6 +169,7 @@ int main(void)
   struct curl_slist *list = NULL;
 
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* add this header */
@@ -182,9 +183,10 @@ int main(void)
 
     curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     curl_slist_free_all(list); /* free the list */
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_HTTPPOST.md b/docs/libcurl/opts/CURLOPT_HTTPPOST.md
index 526f1d9e41..8ae91095e4 100644
--- a/docs/libcurl/opts/CURLOPT_HTTPPOST.md
+++ b/docs/libcurl/opts/CURLOPT_HTTPPOST.md
@@ -84,8 +84,9 @@ int main(void)
 
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
   }
   curl_formfree(formpost);
diff --git a/docs/libcurl/opts/CURLOPT_HTTPPROXYTUNNEL.md b/docs/libcurl/opts/CURLOPT_HTTPPROXYTUNNEL.md
index 75815c3cb5..4087ec40a6 100644
--- a/docs/libcurl/opts/CURLOPT_HTTPPROXYTUNNEL.md
+++ b/docs/libcurl/opts/CURLOPT_HTTPPROXYTUNNEL.md
@@ -59,10 +59,12 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/file.txt");
     curl_easy_setopt(curl, CURLOPT_PROXY, "http://127.0.0.1:80");
     curl_easy_setopt(curl, CURLOPT_HTTPPROXYTUNNEL, 1L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_IGNORE_CONTENT_LENGTH.md b/docs/libcurl/opts/CURLOPT_IGNORE_CONTENT_LENGTH.md
index bbaf4c8e26..c199ee3f37 100644
--- a/docs/libcurl/opts/CURLOPT_IGNORE_CONTENT_LENGTH.md
+++ b/docs/libcurl/opts/CURLOPT_IGNORE_CONTENT_LENGTH.md
@@ -55,12 +55,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* we know the server is silly, ignore content-length */
     curl_easy_setopt(curl, CURLOPT_IGNORE_CONTENT_LENGTH, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_INFILESIZE.md b/docs/libcurl/opts/CURLOPT_INFILESIZE.md
index df6c091353..87e12f3dcb 100644
--- a/docs/libcurl/opts/CURLOPT_INFILESIZE.md
+++ b/docs/libcurl/opts/CURLOPT_INFILESIZE.md
@@ -63,6 +63,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     long uploadsize = FILE_SIZE;
 
     curl_easy_setopt(curl, CURLOPT_URL,
@@ -72,7 +73,8 @@ int main(void)
 
     curl_easy_setopt(curl, CURLOPT_INFILESIZE, uploadsize);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_INFILESIZE_LARGE.md b/docs/libcurl/opts/CURLOPT_INFILESIZE_LARGE.md
index d65e0260fa..7e00499182 100644
--- a/docs/libcurl/opts/CURLOPT_INFILESIZE_LARGE.md
+++ b/docs/libcurl/opts/CURLOPT_INFILESIZE_LARGE.md
@@ -59,6 +59,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_off_t uploadsize = FILE_SIZE;
 
     curl_easy_setopt(curl, CURLOPT_URL,
@@ -68,7 +69,8 @@ int main(void)
 
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, uploadsize);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_INTERLEAVEDATA.md b/docs/libcurl/opts/CURLOPT_INTERLEAVEDATA.md
index 9bd1739202..b426b558bc 100644
--- a/docs/libcurl/opts/CURLOPT_INTERLEAVEDATA.md
+++ b/docs/libcurl/opts/CURLOPT_INTERLEAVEDATA.md
@@ -56,10 +56,12 @@ int main(void)
   struct local rtp_data;
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_INTERLEAVEFUNCTION, rtp_write);
     curl_easy_setopt(curl, CURLOPT_INTERLEAVEDATA, &rtp_data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.md b/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.md
index 38e8fdbc67..73d5d39b78 100644
--- a/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.md
+++ b/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.md
@@ -53,12 +53,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* only allow 30 seconds idle time */
     curl_easy_setopt(curl, CURLOPT_MAXAGE_CONN, 30L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_MAXLIFETIME_CONN.md b/docs/libcurl/opts/CURLOPT_MAXLIFETIME_CONN.md
index 8c1fbf82f8..e979caff72 100644
--- a/docs/libcurl/opts/CURLOPT_MAXLIFETIME_CONN.md
+++ b/docs/libcurl/opts/CURLOPT_MAXLIFETIME_CONN.md
@@ -57,12 +57,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* only allow each connection to be reused for 30 seconds */
     curl_easy_setopt(curl, CURLOPT_MAXLIFETIME_CONN, 30L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_MAXREDIRS.md b/docs/libcurl/opts/CURLOPT_MAXREDIRS.md
index 81541fee19..943702a06c 100644
--- a/docs/libcurl/opts/CURLOPT_MAXREDIRS.md
+++ b/docs/libcurl/opts/CURLOPT_MAXREDIRS.md
@@ -50,6 +50,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
 
     /* enable redirect following */
@@ -59,7 +60,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 3L);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_MIMEPOST.md b/docs/libcurl/opts/CURLOPT_MIMEPOST.md
index 4cd3238bf6..1f12908e15 100644
--- a/docs/libcurl/opts/CURLOPT_MIMEPOST.md
+++ b/docs/libcurl/opts/CURLOPT_MIMEPOST.md
@@ -55,6 +55,7 @@ int main(void)
   if(curl) {
     curl_mime *multipart = curl_mime_init(curl);
     if(multipart) {
+      CURLcode result;
       curl_mimepart *part = curl_mime_addpart(multipart);
       curl_mime_name(part, "name");
       curl_mime_data(part, "daniel", CURL_ZERO_TERMINATED);
@@ -68,9 +69,10 @@ int main(void)
       /* Set the form info */
       curl_easy_setopt(curl, CURLOPT_MIMEPOST, multipart);
 
-      curl_easy_perform(curl); /* post away */
+      result = curl_easy_perform(curl); /* post away */
       curl_mime_free(multipart); /* free the post data */
     }
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_MIME_OPTIONS.md b/docs/libcurl/opts/CURLOPT_MIME_OPTIONS.md
index 4f94b899e6..15ffc97dc3 100644
--- a/docs/libcurl/opts/CURLOPT_MIME_OPTIONS.md
+++ b/docs/libcurl/opts/CURLOPT_MIME_OPTIONS.md
@@ -68,6 +68,7 @@ int main(void)
   curl_mime *form = NULL;
 
   if(curl) {
+    CURLcode result = CURLE_OK;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_MIME_OPTIONS, CURLMIMEOPT_FORMESCAPE);
 
@@ -81,7 +82,7 @@ int main(void)
         curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
 
         /* Perform the request */
-        curl_easy_perform(curl);
+        result = curl_easy_perform(curl);
       }
     }
 
diff --git a/docs/libcurl/opts/CURLOPT_NOBODY.md b/docs/libcurl/opts/CURLOPT_NOBODY.md
index 0f4c2cb990..3cf29d8453 100644
--- a/docs/libcurl/opts/CURLOPT_NOBODY.md
+++ b/docs/libcurl/opts/CURLOPT_NOBODY.md
@@ -59,13 +59,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* get us the resource without a body - use HEAD */
     curl_easy_setopt(curl, CURLOPT_NOBODY, 1L);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_NOPROGRESS.md b/docs/libcurl/opts/CURLOPT_NOPROGRESS.md
index 72c3c9b283..c518359fdd 100644
--- a/docs/libcurl/opts/CURLOPT_NOPROGRESS.md
+++ b/docs/libcurl/opts/CURLOPT_NOPROGRESS.md
@@ -46,13 +46,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* enable progress meter */
     curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_NOPROXY.md b/docs/libcurl/opts/CURLOPT_NOPROXY.md
index 087a49f5b9..244f68a5b9 100644
--- a/docs/libcurl/opts/CURLOPT_NOPROXY.md
+++ b/docs/libcurl/opts/CURLOPT_NOPROXY.md
@@ -76,13 +76,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* accept various URLs */
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
     /* use this proxy */
     curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example:80");
     /* ... but make sure this hostname is not proxied */
     curl_easy_setopt(curl, CURLOPT_NOPROXY, "www.example.com");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PATH_AS_IS.md b/docs/libcurl/opts/CURLOPT_PATH_AS_IS.md
index 5ed250e3fb..c78eaa7e4e 100644
--- a/docs/libcurl/opts/CURLOPT_PATH_AS_IS.md
+++ b/docs/libcurl/opts/CURLOPT_PATH_AS_IS.md
@@ -60,12 +60,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL,
                      "https://example.com/../../etc/password");
 
     curl_easy_setopt(curl, CURLOPT_PATH_AS_IS, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.md b/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.md
index 6eb5d0ee3e..0590143c90 100644
--- a/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.md
+++ b/docs/libcurl/opts/CURLOPT_PINNEDPUBLICKEY.md
@@ -66,6 +66,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_PINNEDPUBLICKEY, "/etc/publickey.der");
     /* OR
@@ -76,7 +77,8 @@ int main(void)
     */
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_POSTFIELDS.md b/docs/libcurl/opts/CURLOPT_POSTFIELDS.md
index 723cd84180..6258e53f20 100644
--- a/docs/libcurl/opts/CURLOPT_POSTFIELDS.md
+++ b/docs/libcurl/opts/CURLOPT_POSTFIELDS.md
@@ -84,6 +84,7 @@ NULL
 /* send an application/x-www-form-urlencoded POST */
 int main(void)
 {
+  CURLcode result = CURLE_OK;
   CURL *curl = curl_easy_init();
   if(curl) {
     const char *data = "data to send";
@@ -96,7 +97,8 @@ int main(void)
     /* pass in a pointer to the data - libcurl does not copy */
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 
   /* send an application/json POST */
@@ -115,7 +117,8 @@ int main(void)
     /* pass in a pointer to the data - libcurl does not copy */
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, json);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md b/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md
index 10414e7eea..4dbc324e2d 100644
--- a/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md
+++ b/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE.md
@@ -51,6 +51,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     const char *data = "data to send";
 
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
@@ -60,7 +61,8 @@ int main(void)
 
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE_LARGE.md b/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE_LARGE.md
index e3d983e253..9f2fcb2f97 100644
--- a/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE_LARGE.md
+++ b/docs/libcurl/opts/CURLOPT_POSTFIELDSIZE_LARGE.md
@@ -51,6 +51,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     const char *data = large_chunk;
     curl_off_t length_of_data = 12345; /* set somehow */
 
@@ -61,7 +62,8 @@ int main(void)
 
     curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_POSTREDIR.md b/docs/libcurl/opts/CURLOPT_POSTREDIR.md
index 521d770a5e..13cd9f333d 100644
--- a/docs/libcurl/opts/CURLOPT_POSTREDIR.md
+++ b/docs/libcurl/opts/CURLOPT_POSTREDIR.md
@@ -61,6 +61,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* a silly POST example */
@@ -70,7 +71,8 @@ int main(void)
        302 and 303 HTTP response codes */
     curl_easy_setopt(curl, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PREREQDATA.md b/docs/libcurl/opts/CURLOPT_PREREQDATA.md
index 2ea99129d0..d7d6439ece 100644
--- a/docs/libcurl/opts/CURLOPT_PREREQDATA.md
+++ b/docs/libcurl/opts/CURLOPT_PREREQDATA.md
@@ -58,9 +58,11 @@ int main(void)
   struct priv prereq_data;
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_PREREQFUNCTION, prereq_callback);
     curl_easy_setopt(curl, CURLOPT_PREREQDATA, &prereq_data);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PREREQFUNCTION.md b/docs/libcurl/opts/CURLOPT_PREREQFUNCTION.md
index 897cda42c2..f6b474f7eb 100644
--- a/docs/libcurl/opts/CURLOPT_PREREQFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_PREREQFUNCTION.md
@@ -111,9 +111,11 @@ int main(void)
   struct priv prereq_data;
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_PREREQFUNCTION, prereq_callback);
     curl_easy_setopt(curl, CURLOPT_PREREQDATA, &prereq_data);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PRE_PROXY.md b/docs/libcurl/opts/CURLOPT_PRE_PROXY.md
index 30cfd9f0d7..3b447fa907 100644
--- a/docs/libcurl/opts/CURLOPT_PRE_PROXY.md
+++ b/docs/libcurl/opts/CURLOPT_PRE_PROXY.md
@@ -70,10 +70,12 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/file.txt");
     curl_easy_setopt(curl, CURLOPT_PRE_PROXY, "socks4://socks-proxy:1080");
     curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy:80");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PRIVATE.md b/docs/libcurl/opts/CURLOPT_PRIVATE.md
index 9fe9ef3054..e59016bf8c 100644
--- a/docs/libcurl/opts/CURLOPT_PRIVATE.md
+++ b/docs/libcurl/opts/CURLOPT_PRIVATE.md
@@ -50,16 +50,19 @@ int main(void)
   CURL *curl = curl_easy_init();
   struct private secrets;
   if(curl) {
+    CURLcode result;
     struct private *extracted;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* store a pointer to our private struct */
     curl_easy_setopt(curl, CURLOPT_PRIVATE, &secrets);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* we can extract the private pointer again too */
     curl_easy_getinfo(curl, CURLINFO_PRIVATE, &extracted);
+
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROGRESSDATA.md b/docs/libcurl/opts/CURLOPT_PROGRESSDATA.md
index c8f59321ca..6222995e61 100644
--- a/docs/libcurl/opts/CURLOPT_PROGRESSDATA.md
+++ b/docs/libcurl/opts/CURLOPT_PROGRESSDATA.md
@@ -61,13 +61,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     struct progress data;
 
     /* pass struct to callback */
     curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &data);
     curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROGRESSFUNCTION.md b/docs/libcurl/opts/CURLOPT_PROGRESSFUNCTION.md
index 47718002da..d1d6ba3d37 100644
--- a/docs/libcurl/opts/CURLOPT_PROGRESSFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_PROGRESSFUNCTION.md
@@ -109,11 +109,13 @@ int main(void)
 
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* pass struct to callback */
     curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &data);
     curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROTOCOLS.md b/docs/libcurl/opts/CURLOPT_PROTOCOLS.md
index 0d5fca78af..cdd02b5ed8 100644
--- a/docs/libcurl/opts/CURLOPT_PROTOCOLS.md
+++ b/docs/libcurl/opts/CURLOPT_PROTOCOLS.md
@@ -86,6 +86,7 @@ int main(int argc, char **argv)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* pass in the URL from an external source */
     curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
 
@@ -94,7 +95,8 @@ int main(int argc, char **argv)
                      CURLPROTO_HTTP | CURLPROTO_TFTP | CURLPROTO_SFTP);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROTOCOLS_STR.md b/docs/libcurl/opts/CURLOPT_PROTOCOLS_STR.md
index 7044dc8d81..02a78ae5d6 100644
--- a/docs/libcurl/opts/CURLOPT_PROTOCOLS_STR.md
+++ b/docs/libcurl/opts/CURLOPT_PROTOCOLS_STR.md
@@ -69,6 +69,7 @@ int main(int argc, char **argv)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* pass in the URL from an external source */
     curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
 
@@ -76,7 +77,8 @@ int main(int argc, char **argv)
     curl_easy_setopt(curl, CURLOPT_PROTOCOLS_STR, "http,tftp,sftp");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROXY.md b/docs/libcurl/opts/CURLOPT_PROXY.md
index dd42878deb..3f8cf6bf5d 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY.md
+++ b/docs/libcurl/opts/CURLOPT_PROXY.md
@@ -136,9 +136,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/file.txt");
     curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example:80");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROXYHEADER.md b/docs/libcurl/opts/CURLOPT_PROXYHEADER.md
index 0168e2903b..340446b53e 100644
--- a/docs/libcurl/opts/CURLOPT_PROXYHEADER.md
+++ b/docs/libcurl/opts/CURLOPT_PROXYHEADER.md
@@ -61,6 +61,7 @@ int main(void)
   struct curl_slist *list;
 
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example.com:80");
 
@@ -69,9 +70,10 @@ int main(void)
 
     curl_easy_setopt(curl, CURLOPT_PROXYHEADER, list);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     curl_slist_free_all(list); /* free the list again */
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.md b/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.md
index 85a404459f..21e0bd42a3 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.md
+++ b/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.md
@@ -66,6 +66,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy.example:443");
     curl_easy_setopt(curl, CURLOPT_PROXY_PINNEDPUBLICKEY,
@@ -74,7 +75,8 @@ int main(void)
                      "Gxa2eg7fRbEgoChTociMee9wno=");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROXY_SSLVERSION.md b/docs/libcurl/opts/CURLOPT_PROXY_SSLVERSION.md
index bb35bda1ae..eb35d9c323 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY_SSLVERSION.md
+++ b/docs/libcurl/opts/CURLOPT_PROXY_SSLVERSION.md
@@ -102,13 +102,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* ask libcurl to use TLS version 1.0 or later */
     curl_easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYHOST.md b/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYHOST.md
index 29d83ef464..bc86ed1c3f 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYHOST.md
+++ b/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYHOST.md
@@ -74,12 +74,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* Set the default value: strict name check please */
     curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYHOST, 2L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYPEER.md b/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYPEER.md
index ef3f83d47e..62239eae24 100644
--- a/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYPEER.md
+++ b/docs/libcurl/opts/CURLOPT_PROXY_SSL_VERIFYPEER.md
@@ -76,12 +76,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* Set the default value: strict certificate check please */
     curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYPEER, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_PUT.md b/docs/libcurl/opts/CURLOPT_PUT.md
index 870cc9a460..3e44da6fc4 100644
--- a/docs/libcurl/opts/CURLOPT_PUT.md
+++ b/docs/libcurl/opts/CURLOPT_PUT.md
@@ -55,9 +55,13 @@ static size_t read_cb(char *ptr, size_t size, size_t nmemb, void *userdata)
 
 int main(void)
 {
-  CURL *curl = curl_easy_init();
+  CURL *curl;
+  FILE *src = fopen("local-file", "r");
+  if(!src)
+    return 1;
+  curl = curl_easy_init();
   if(curl) {
-    FILE *src = fopen("local-file", "r");
+    CURLcode result;
     curl_off_t fsize = 123456; /* set this to the size of the input file */
 
     /* we want to use our own read function */
@@ -76,8 +80,10 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)fsize);
 
     /* Now run off and do what you have been told */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
+  fclose(src);
 }
 ~~~
 
diff --git a/docs/libcurl/opts/CURLOPT_RANGE.md b/docs/libcurl/opts/CURLOPT_RANGE.md
index 389ea60a38..4f7f1a88b2 100644
--- a/docs/libcurl/opts/CURLOPT_RANGE.md
+++ b/docs/libcurl/opts/CURLOPT_RANGE.md
@@ -73,13 +73,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* get the first 200 bytes */
     curl_easy_setopt(curl, CURLOPT_RANGE, "0-199");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_READDATA.md b/docs/libcurl/opts/CURLOPT_READDATA.md
index ae3ac3c484..fb18753363 100644
--- a/docs/libcurl/opts/CURLOPT_READDATA.md
+++ b/docs/libcurl/opts/CURLOPT_READDATA.md
@@ -57,13 +57,15 @@ int main(void)
   CURL *curl = curl_easy_init();
   struct MyData this;
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* pass pointer that gets passed in to the
        CURLOPT_READFUNCTION callback */
     curl_easy_setopt(curl, CURLOPT_READDATA, &this);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md b/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md
index f8c45519fb..1d860312c0 100644
--- a/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md
+++ b/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS.md
@@ -91,6 +91,7 @@ int main(int argc, char **argv)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* pass in the URL from an external source */
     curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
 
@@ -99,7 +100,8 @@ int main(int argc, char **argv)
                      CURLPROTO_HTTP | CURLPROTO_HTTPS);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS_STR.md b/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS_STR.md
index 88d3620306..8f3c0ef885 100644
--- a/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS_STR.md
+++ b/docs/libcurl/opts/CURLOPT_REDIR_PROTOCOLS_STR.md
@@ -75,6 +75,7 @@ int main(int argc, char **argv)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* pass in the URL from an external source */
     curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
 
@@ -82,7 +83,8 @@ int main(int argc, char **argv)
     curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS_STR, "http,https");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_REFERER.md b/docs/libcurl/opts/CURLOPT_REFERER.md
index 8a328a8307..5c927016e2 100644
--- a/docs/libcurl/opts/CURLOPT_REFERER.md
+++ b/docs/libcurl/opts/CURLOPT_REFERER.md
@@ -51,12 +51,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* tell it where we found the link to this place */
     curl_easy_setopt(curl, CURLOPT_REFERER, "https://example.org/me.html");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_REQUEST_TARGET.md b/docs/libcurl/opts/CURLOPT_REQUEST_TARGET.md
index 97f5c24efa..2c2cf201a9 100644
--- a/docs/libcurl/opts/CURLOPT_REQUEST_TARGET.md
+++ b/docs/libcurl/opts/CURLOPT_REQUEST_TARGET.md
@@ -53,6 +53,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/*");
     curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "OPTIONS");
 
@@ -60,7 +61,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_REQUEST_TARGET, "*");
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_RESOLVE.md b/docs/libcurl/opts/CURLOPT_RESOLVE.md
index e923c46752..b4152b11af 100644
--- a/docs/libcurl/opts/CURLOPT_RESOLVE.md
+++ b/docs/libcurl/opts/CURLOPT_RESOLVE.md
@@ -96,10 +96,11 @@ int main(void)
 
   curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_RESOLVE, host);
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* always cleanup */
     curl_easy_cleanup(curl);
diff --git a/docs/libcurl/opts/CURLOPT_RESOLVER_START_DATA.md b/docs/libcurl/opts/CURLOPT_RESOLVER_START_DATA.md
index 867e25066f..4e283cb29b 100644
--- a/docs/libcurl/opts/CURLOPT_RESOLVER_START_DATA.md
+++ b/docs/libcurl/opts/CURLOPT_RESOLVER_START_DATA.md
@@ -53,10 +53,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_RESOLVER_START_FUNCTION, resolver_start_cb);
     curl_easy_setopt(curl, CURLOPT_RESOLVER_START_DATA, curl);
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
   }
 }
diff --git a/docs/libcurl/opts/CURLOPT_RESOLVER_START_FUNCTION.md b/docs/libcurl/opts/CURLOPT_RESOLVER_START_FUNCTION.md
index 5297601058..04e3b0d1b2 100644
--- a/docs/libcurl/opts/CURLOPT_RESOLVER_START_FUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_RESOLVER_START_FUNCTION.md
@@ -71,10 +71,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_RESOLVER_START_FUNCTION, start_cb);
     curl_easy_setopt(curl, CURLOPT_RESOLVER_START_DATA, curl);
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
     curl_easy_cleanup(curl);
   }
 }
diff --git a/docs/libcurl/opts/CURLOPT_RESUME_FROM.md b/docs/libcurl/opts/CURLOPT_RESUME_FROM.md
index 73892b1030..d688430ba6 100644
--- a/docs/libcurl/opts/CURLOPT_RESUME_FROM.md
+++ b/docs/libcurl/opts/CURLOPT_RESUME_FROM.md
@@ -53,6 +53,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     long size_of_file = 6789;
 
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
@@ -67,7 +68,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_INFILESIZE, size_of_file);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_RESUME_FROM_LARGE.md b/docs/libcurl/opts/CURLOPT_RESUME_FROM_LARGE.md
index 32bc341af5..da1d9aa53f 100644
--- a/docs/libcurl/opts/CURLOPT_RESUME_FROM_LARGE.md
+++ b/docs/libcurl/opts/CURLOPT_RESUME_FROM_LARGE.md
@@ -51,6 +51,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_off_t resume_position = 1234; /* get it somehow */
     curl_off_t file_size = 9876; /* get it somehow as well */
 
@@ -66,7 +67,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_size);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SOCKS5_AUTH.md b/docs/libcurl/opts/CURLOPT_SOCKS5_AUTH.md
index 7ff97484df..2fe3de3f45 100644
--- a/docs/libcurl/opts/CURLOPT_SOCKS5_AUTH.md
+++ b/docs/libcurl/opts/CURLOPT_SOCKS5_AUTH.md
@@ -55,6 +55,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* request to use a SOCKS5 proxy */
@@ -64,7 +65,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_SOCKS5_AUTH, CURLAUTH_BASIC);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSH_COMPRESSION.md b/docs/libcurl/opts/CURLOPT_SSH_COMPRESSION.md
index fa50dea52f..291f924d4d 100644
--- a/docs/libcurl/opts/CURLOPT_SSH_COMPRESSION.md
+++ b/docs/libcurl/opts/CURLOPT_SSH_COMPRESSION.md
@@ -45,13 +45,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com");
 
     /* enable built-in compression */
     curl_easy_setopt(curl, CURLOPT_SSH_COMPRESSION, 1L);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYDATA.md b/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYDATA.md
index a986a80b75..fc3e48aa80 100644
--- a/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYDATA.md
+++ b/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYDATA.md
@@ -56,12 +56,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     struct mine callback_data;
     curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");
     curl_easy_setopt(curl, CURLOPT_SSH_HOSTKEYFUNCTION, hostkeycb);
     curl_easy_setopt(curl, CURLOPT_SSH_HOSTKEYDATA, &callback_data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYFUNCTION.md b/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYFUNCTION.md
index 0f7e9996bd..09aa83c875 100644
--- a/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_SSH_HOSTKEYFUNCTION.md
@@ -82,11 +82,13 @@ int main(void)
   struct mine callback_data;
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");
     curl_easy_setopt(curl, CURLOPT_SSH_HOSTKEYFUNCTION, hostkeycb);
     curl_easy_setopt(curl, CURLOPT_SSH_HOSTKEYDATA, &callback_data);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSH_KEYDATA.md b/docs/libcurl/opts/CURLOPT_SSH_KEYDATA.md
index 39e403f6c3..aebaf79af1 100644
--- a/docs/libcurl/opts/CURLOPT_SSH_KEYDATA.md
+++ b/docs/libcurl/opts/CURLOPT_SSH_KEYDATA.md
@@ -57,13 +57,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     struct mine callback_data;
     curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");
     curl_easy_setopt(curl, CURLOPT_SSH_KEYFUNCTION, keycb);
     curl_easy_setopt(curl, CURLOPT_SSH_KEYDATA, &callback_data);
     curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS, "/home/user/known_hosts");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSH_KEYFUNCTION.md b/docs/libcurl/opts/CURLOPT_SSH_KEYFUNCTION.md
index 85801b8af7..72bbbb4d92 100644
--- a/docs/libcurl/opts/CURLOPT_SSH_KEYFUNCTION.md
+++ b/docs/libcurl/opts/CURLOPT_SSH_KEYFUNCTION.md
@@ -134,13 +134,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     struct mine callback_data;
     curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");
     curl_easy_setopt(curl, CURLOPT_SSH_KEYFUNCTION, keycb);
     curl_easy_setopt(curl, CURLOPT_SSH_KEYDATA, &callback_data);
     curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS, "/home/user/known_hosts");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSLVERSION.md b/docs/libcurl/opts/CURLOPT_SSLVERSION.md
index 6aa641def9..411da989ef 100644
--- a/docs/libcurl/opts/CURLOPT_SSLVERSION.md
+++ b/docs/libcurl/opts/CURLOPT_SSLVERSION.md
@@ -114,13 +114,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* ask libcurl to use TLS version 1.0 or later */
     curl_easy_setopt(curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSL_FALSESTART.md b/docs/libcurl/opts/CURLOPT_SSL_FALSESTART.md
index a3e7159126..d63a24c35e 100644
--- a/docs/libcurl/opts/CURLOPT_SSL_FALSESTART.md
+++ b/docs/libcurl/opts/CURLOPT_SSL_FALSESTART.md
@@ -47,9 +47,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_SSL_FALSESTART, 1L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSL_VERIFYHOST.md b/docs/libcurl/opts/CURLOPT_SSL_VERIFYHOST.md
index 2672f7846a..d4c0ae9acf 100644
--- a/docs/libcurl/opts/CURLOPT_SSL_VERIFYHOST.md
+++ b/docs/libcurl/opts/CURLOPT_SSL_VERIFYHOST.md
@@ -88,12 +88,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* Set the default value: strict name check please */
     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 2L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_SSL_VERIFYPEER.md b/docs/libcurl/opts/CURLOPT_SSL_VERIFYPEER.md
index 23a7b6947f..ad0242ba58 100644
--- a/docs/libcurl/opts/CURLOPT_SSL_VERIFYPEER.md
+++ b/docs/libcurl/opts/CURLOPT_SSL_VERIFYPEER.md
@@ -82,12 +82,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* Set the default value: strict certificate check please */
     curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_STDERR.md b/docs/libcurl/opts/CURLOPT_STDERR.md
index 54c700b85d..213eb9ef0e 100644
--- a/docs/libcurl/opts/CURLOPT_STDERR.md
+++ b/docs/libcurl/opts/CURLOPT_STDERR.md
@@ -46,14 +46,20 @@ stderr
 ~~~c
 int main(void)
 {
-  CURL *curl = curl_easy_init();
+  CURL *curl;
   FILE *filep = fopen("dump", "wb");
+  if(!filep)
+    return 1;
+  curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_STDERR, filep);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
+  fclose(filep);
 }
 ~~~
 
diff --git a/docs/libcurl/opts/CURLOPT_SUPPRESS_CONNECT_HEADERS.md b/docs/libcurl/opts/CURLOPT_SUPPRESS_CONNECT_HEADERS.md
index e86be358ed..b096fcb83f 100644
--- a/docs/libcurl/opts/CURLOPT_SUPPRESS_CONNECT_HEADERS.md
+++ b/docs/libcurl/opts/CURLOPT_SUPPRESS_CONNECT_HEADERS.md
@@ -80,6 +80,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_HEADER, 1L);
@@ -87,7 +88,7 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_HTTPPROXYTUNNEL, 1L);
     curl_easy_setopt(curl, CURLOPT_SUPPRESS_CONNECT_HEADERS, 1L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* always cleanup */
     curl_easy_cleanup(curl);
diff --git a/docs/libcurl/opts/CURLOPT_TCP_FASTOPEN.md b/docs/libcurl/opts/CURLOPT_TCP_FASTOPEN.md
index fcb598358b..d27d1204de 100644
--- a/docs/libcurl/opts/CURLOPT_TCP_FASTOPEN.md
+++ b/docs/libcurl/opts/CURLOPT_TCP_FASTOPEN.md
@@ -47,9 +47,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_TCP_FASTOPEN, 1L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TCP_KEEPALIVE.md b/docs/libcurl/opts/CURLOPT_TCP_KEEPALIVE.md
index 9b8062eeac..cab2f2f4d8 100644
--- a/docs/libcurl/opts/CURLOPT_TCP_KEEPALIVE.md
+++ b/docs/libcurl/opts/CURLOPT_TCP_KEEPALIVE.md
@@ -48,6 +48,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* enable TCP keep-alive for this transfer */
@@ -62,7 +63,8 @@ int main(void)
     /* maximum number of keep-alive probes: 3 */
     curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TCP_KEEPCNT.md b/docs/libcurl/opts/CURLOPT_TCP_KEEPCNT.md
index d38d032bbf..22959479cc 100644
--- a/docs/libcurl/opts/CURLOPT_TCP_KEEPCNT.md
+++ b/docs/libcurl/opts/CURLOPT_TCP_KEEPCNT.md
@@ -48,6 +48,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* enable TCP keep-alive for this transfer */
@@ -62,7 +63,8 @@ int main(void)
     /* maximum number of keep-alive probes: 3 */
     curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TCP_KEEPIDLE.md b/docs/libcurl/opts/CURLOPT_TCP_KEEPIDLE.md
index 6bccca84bd..6ffaf05ad5 100644
--- a/docs/libcurl/opts/CURLOPT_TCP_KEEPIDLE.md
+++ b/docs/libcurl/opts/CURLOPT_TCP_KEEPIDLE.md
@@ -47,6 +47,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* enable TCP keep-alive for this transfer */
@@ -61,7 +62,8 @@ int main(void)
     /* maximum number of keep-alive probes: 3 */
     curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TCP_KEEPINTVL.md b/docs/libcurl/opts/CURLOPT_TCP_KEEPINTVL.md
index 2d664439a2..f23278c6c5 100644
--- a/docs/libcurl/opts/CURLOPT_TCP_KEEPINTVL.md
+++ b/docs/libcurl/opts/CURLOPT_TCP_KEEPINTVL.md
@@ -46,6 +46,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* enable TCP keep-alive for this transfer */
@@ -60,7 +61,8 @@ int main(void)
     /* maximum number of keep-alive probes: 3 */
     curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TCP_NODELAY.md b/docs/libcurl/opts/CURLOPT_TCP_NODELAY.md
index 50c961890e..74a49527b3 100644
--- a/docs/libcurl/opts/CURLOPT_TCP_NODELAY.md
+++ b/docs/libcurl/opts/CURLOPT_TCP_NODELAY.md
@@ -54,10 +54,12 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     /* leave Nagle enabled */
     curl_easy_setopt(curl, CURLOPT_TCP_NODELAY, 0L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TFTP_NO_OPTIONS.md b/docs/libcurl/opts/CURLOPT_TFTP_NO_OPTIONS.md
index 90f665aec4..43f3317c01 100644
--- a/docs/libcurl/opts/CURLOPT_TFTP_NO_OPTIONS.md
+++ b/docs/libcurl/opts/CURLOPT_TFTP_NO_OPTIONS.md
@@ -50,6 +50,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result = CURLE_OK;
     FILE *fp = fopen("foo.bin", "wb");
     if(fp) {
       curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)fp);
@@ -61,7 +62,7 @@ int main(void)
       curl_easy_setopt(curl, CURLOPT_TFTP_NO_OPTIONS, 1L);
 
       /* Perform the request */
-      curl_easy_perform(curl);
+      result = curl_easy_perform(curl);
 
       fclose(fp);
     }
diff --git a/docs/libcurl/opts/CURLOPT_TIMECONDITION.md b/docs/libcurl/opts/CURLOPT_TIMECONDITION.md
index f03473f608..3ebfb10386 100644
--- a/docs/libcurl/opts/CURLOPT_TIMECONDITION.md
+++ b/docs/libcurl/opts/CURLOPT_TIMECONDITION.md
@@ -51,6 +51,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* January 1, 2020 is 1577833200 */
@@ -60,7 +61,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TIMEOUT.md b/docs/libcurl/opts/CURLOPT_TIMEOUT.md
index c6b9e3be68..4058dd4cb7 100644
--- a/docs/libcurl/opts/CURLOPT_TIMEOUT.md
+++ b/docs/libcurl/opts/CURLOPT_TIMEOUT.md
@@ -71,12 +71,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* complete within 20 seconds */
     curl_easy_setopt(curl, CURLOPT_TIMEOUT, 20L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TIMEOUT_MS.md b/docs/libcurl/opts/CURLOPT_TIMEOUT_MS.md
index a5a9d8b7fa..11e3403002 100644
--- a/docs/libcurl/opts/CURLOPT_TIMEOUT_MS.md
+++ b/docs/libcurl/opts/CURLOPT_TIMEOUT_MS.md
@@ -46,12 +46,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* complete within 20000 milliseconds */
     curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, 20000L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TIMEVALUE.md b/docs/libcurl/opts/CURLOPT_TIMEVALUE.md
index fde25a5cb8..e28ccf5d23 100644
--- a/docs/libcurl/opts/CURLOPT_TIMEVALUE.md
+++ b/docs/libcurl/opts/CURLOPT_TIMEVALUE.md
@@ -47,6 +47,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* January 1, 2020 is 1577833200 */
@@ -56,7 +57,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TIMEVALUE_LARGE.md b/docs/libcurl/opts/CURLOPT_TIMEVALUE_LARGE.md
index 3e0e9146cf..385b067b18 100644
--- a/docs/libcurl/opts/CURLOPT_TIMEVALUE_LARGE.md
+++ b/docs/libcurl/opts/CURLOPT_TIMEVALUE_LARGE.md
@@ -49,6 +49,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* January 1, 2020 is 1577833200 */
@@ -58,7 +59,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_TRANSFER_ENCODING.md b/docs/libcurl/opts/CURLOPT_TRANSFER_ENCODING.md
index 07e7266da5..dead797f1f 100644
--- a/docs/libcurl/opts/CURLOPT_TRANSFER_ENCODING.md
+++ b/docs/libcurl/opts/CURLOPT_TRANSFER_ENCODING.md
@@ -53,9 +53,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_TRANSFER_ENCODING, 1L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_UNIX_SOCKET_PATH.md b/docs/libcurl/opts/CURLOPT_UNIX_SOCKET_PATH.md
index 3d5520be5e..2ff1c1bcb5 100644
--- a/docs/libcurl/opts/CURLOPT_UNIX_SOCKET_PATH.md
+++ b/docs/libcurl/opts/CURLOPT_UNIX_SOCKET_PATH.md
@@ -62,10 +62,12 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_UNIX_SOCKET_PATH, "/tmp/httpd.sock");
     curl_easy_setopt(curl, CURLOPT_URL, "http://localhost/");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_UNRESTRICTED_AUTH.md b/docs/libcurl/opts/CURLOPT_UNRESTRICTED_AUTH.md
index 202087c006..2dc15ca6b0 100644
--- a/docs/libcurl/opts/CURLOPT_UNRESTRICTED_AUTH.md
+++ b/docs/libcurl/opts/CURLOPT_UNRESTRICTED_AUTH.md
@@ -69,10 +69,12 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
     curl_easy_setopt(curl, CURLOPT_UNRESTRICTED_AUTH, 1L);
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_UPKEEP_INTERVAL_MS.md b/docs/libcurl/opts/CURLOPT_UPKEEP_INTERVAL_MS.md
index 5bf7ac2a35..8b0e87cfb6 100644
--- a/docs/libcurl/opts/CURLOPT_UPKEEP_INTERVAL_MS.md
+++ b/docs/libcurl/opts/CURLOPT_UPKEEP_INTERVAL_MS.md
@@ -51,13 +51,14 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     /* Make a connection to an HTTP/2 server. */
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* Set the interval to 30000ms / 30s */
     curl_easy_setopt(curl, CURLOPT_UPKEEP_INTERVAL_MS, 30000L);
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
 
     /* Perform more work here. */
 
diff --git a/docs/libcurl/opts/CURLOPT_UPLOAD.md b/docs/libcurl/opts/CURLOPT_UPLOAD.md
index a396a0eca1..5c81b86fe4 100644
--- a/docs/libcurl/opts/CURLOPT_UPLOAD.md
+++ b/docs/libcurl/opts/CURLOPT_UPLOAD.md
@@ -65,6 +65,7 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     FILE *src = fopen("local-file", "r");
     curl_off_t fsize = 1234; /* set this to the size of the input file */
 
@@ -84,7 +85,8 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)fsize);
 
     /* Now run off and do what you have been told */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_UPLOAD_FLAGS.md b/docs/libcurl/opts/CURLOPT_UPLOAD_FLAGS.md
index 0faf3a9944..0e8c723dc8 100644
--- a/docs/libcurl/opts/CURLOPT_UPLOAD_FLAGS.md
+++ b/docs/libcurl/opts/CURLOPT_UPLOAD_FLAGS.md
@@ -77,9 +77,14 @@ static size_t read_cb(char *ptr, size_t size, size_t nmemb, void *userdata)
 
 int main(void)
 {
-  CURL *curl = curl_easy_init();
+  CURL *curl;
+  FILE *src = fopen("local-file", "r");
+  if(!src)
+    return 1;
+
+  curl = curl_easy_init();
   if(curl) {
-    FILE *src = fopen("local-file", "r");
+    CURLcode result;
     curl_off_t fsize = 9876; /* set this to the size of the input file */
 
     /* we want to use our own read function */
@@ -107,8 +112,10 @@ int main(void)
     curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, (curl_off_t)fsize);
 
     /* perform the upload */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
+  fclose(src);
 }
 ~~~
 
diff --git a/docs/libcurl/opts/CURLOPT_URL.md b/docs/libcurl/opts/CURLOPT_URL.md
index cc1f5366c9..2ad4739391 100644
--- a/docs/libcurl/opts/CURLOPT_URL.md
+++ b/docs/libcurl/opts/CURLOPT_URL.md
@@ -127,9 +127,11 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_USERAGENT.md b/docs/libcurl/opts/CURLOPT_USERAGENT.md
index c44c9b08cf..7aae9cde78 100644
--- a/docs/libcurl/opts/CURLOPT_USERAGENT.md
+++ b/docs/libcurl/opts/CURLOPT_USERAGENT.md
@@ -51,11 +51,13 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     curl_easy_setopt(curl, CURLOPT_USERAGENT, "Dark Secret Ninja/1.0");
 
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_USE_SSL.md b/docs/libcurl/opts/CURLOPT_USE_SSL.md
index 0729f6e84e..03b03df5df 100644
--- a/docs/libcurl/opts/CURLOPT_USE_SSL.md
+++ b/docs/libcurl/opts/CURLOPT_USE_SSL.md
@@ -40,16 +40,23 @@ This is for enabling SSL/TLS when you use FTP, SMTP, POP3, IMAP etc.
 
 ## CURLUSESSL_NONE
 
-do not attempt to use SSL.
+Do not attempt to use SSL.
 
 ## CURLUSESSL_TRY
 
 Try using SSL, proceed as normal otherwise. Note that server may close the
-connection if the negotiation fails.
+connection if the negotiation fails. This level is *insecure* and should be
+avoided since it allows the connection to remain unprotected.
 
 ## CURLUSESSL_CONTROL
 
 Require SSL for the control connection or fail with *CURLE_USE_SSL_FAILED*.
+This level is partially *insecure* and should be avoided since it lets the
+data connection remain unprotected.
+
+This level is meant for FTP, since that is the only protocol with separate
+connections for control and data. If used for IMAP, POP3 or SMTP it equals
+`CURLUSESSL_ALL`.
 
 ## CURLUSESSL_ALL
 
@@ -68,13 +75,15 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/file.ext");
 
     /* require use of SSL for this, or fail */
     curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
   }
 }
 ~~~
diff --git a/docs/libcurl/opts/CURLOPT_VERBOSE.md b/docs/libcurl/opts/CURLOPT_VERBOSE.md
index cc33851ac9..80b66a8a63 100644
--- a/docs/libcurl/opts/CURLOPT_VERBOSE.md
+++ b/docs/libcurl/opts/CURLOPT_VERBOSE.md
@@ -54,13 +54,16 @@ int main(void)
 {
   CURL *curl = curl_easy_init();
   if(curl) {
+    CURLcode result;
     curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
 
     /* ask libcurl to show us the verbose output */
     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
 
     /* Perform the request */
-    curl_easy_perform(curl);
+    result = curl_easy_perform(curl);
+
+    curl_easy_cleanup(curl);
   }
 }
 ~~~