misc: Fix typos in docs and lib

This fixes miscellaneous typos and duplicated words in the docs, lib
and test comments and a few user facing errorstrings.

Author: RainRat on Github
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Dan Fandrich <dan@coneharvesters.com>
Closes: #13019

lib/asyn-ares.c

@@ -850,7 +850,7 @@ CURLcode Curl_set_dns_servers(struct Curl_easy *data,
   /* If server is NULL or empty, this would purge all DNS servers
    * from ares library, which will cause any and all queries to fail.
    * So, just return OK if none are configured and don't actually make
-   * any changes to c-ares.  This lets c-ares use it's defaults, which
+   * any changes to c-ares.  This lets c-ares use its defaults, which
    * it gets from the OS (for instance from /etc/resolv.conf on Linux).
    */
   if(!(servers && servers[0]))

lib/cfilters.h

@@ -402,7 +402,7 @@ void Curl_conn_adjust_pollset(struct Curl_easy *data,
 /**
  * Receive data through the filter chain at `sockindex` for connection
  * `data->conn`. Copy at most `len` bytes into `buf`. Return the
- * actuel number of bytes copied or a negative value on error.
+ * actual number of bytes copied or a negative value on error.
  * The error code is placed into `*code`.
  */
 ssize_t Curl_cf_recv(struct Curl_easy *data, int sockindex, char *buf,

lib/curl_des.c

@@ -36,7 +36,7 @@
  * Curl_des_set_odd_parity()
  *
  * This is used to apply odd parity to the given byte array. It is typically
- * used by when a cryptography engines doesn't have it's own version.
+ * used by when a cryptography engine doesn't have its own version.
  *
  * The function is a port of the Java based oddParity() function over at:
  *

lib/hostip.c

@@ -288,7 +288,7 @@ static struct Curl_dns_entry *fetch_addr(struct Curl_easy *data,
   size_t entry_len = create_hostcache_id(hostname, 0, port,
                                          entry_id, sizeof(entry_id));
 
-  /* See if its already in our dns cache */
+  /* See if it's already in our dns cache */
   dns = Curl_hash_pick(data->dns.hostcache, entry_id, entry_len + 1);
 
   /* No entry found in cache, check if we might have a wildcard entry */

lib/http.c

@@ -4125,7 +4125,7 @@ CURLcode Curl_http_write_resp(struct Curl_easy *data,
   blen -= consumed;
   buf += consumed;
   /* either all was consumed in header parsing, or we have data left
-   * and are done with heders, e.g. it is BODY data */
+   * and are done with headers, e.g. it is BODY data */
   DEBUGASSERT(!blen || !data->req.header);
   if(!data->req.header && (blen || is_eos)) {
     /* BODY data after header been parsed, write and consume */

lib/mprintf.c

@@ -642,7 +642,7 @@ static int parsefmt(const char *format,
  * On success, the input array describes the type of all arguments and their
  * values.
  *
- * The function then iterates over the output sengments and outputs them one
+ * The function then iterates over the output segments and outputs them one
  * by one until done. Using the appropriate input arguments (if any).
  *
  * All output is sent to the 'stream()' callback, one byte at a time.

lib/socks_gssapi.c

@@ -475,7 +475,7 @@ CURLcode Curl_SOCKS5_gssapi_negotiate(struct Curl_cfilter *cf,
                               gss_recv_token.length, &actualread);
 
   if(result || (actualread != us_length)) {
-    failf(data, "Failed to receive GSS-API encryptrion type.");
+    failf(data, "Failed to receive GSS-API encryption type.");
     gss_release_buffer(&gss_status, &gss_recv_token);
     gss_delete_sec_context(&gss_status, &gss_context, NULL);
     return CURLE_COULDNT_CONNECT;

lib/vquic/curl_ngtcp2.c

@@ -1769,7 +1769,7 @@ static CURLcode cf_progress_egress(struct Curl_cfilter *cf,
   }
 
   /* In UDP, there is a maximum theoretical packet paload length and
-   * a minimum payload length that is "guarantueed" to work.
+   * a minimum payload length that is "guaranteed" to work.
    * To detect if this minimum payload can be increased, ngtcp2 sends
    * now and then a packet payload larger than the minimum. It that
    * is ACKed by the peer, both parties know that it works and

lib/vquic/curl_osslq.c

@@ -426,7 +426,7 @@ static CURLcode cf_osslq_ssl_err(struct Curl_cfilter *cf,
 #endif
   else if((lib == ERR_LIB_SSL) && (reason == SSL_R_PROTOCOL_IS_SHUTDOWN)) {
     ctx->protocol_shutdown = TRUE;
-    err_descr = "QUIC connectin has been shut down";
+    err_descr = "QUIC connection has been shut down";
     result = def_result;
   }
   else {

lib/vssh/libssh2.c

@@ -3272,7 +3272,7 @@ static CURLcode ssh_connect(struct Curl_easy *data, bool *done)
 #endif /* CURL_LIBSSH2_DEBUG */
 
   /* libcurl MUST to set custom memory functions so that the kbd_callback
-     funciton's memory allocations can be properled freed */
+     function's memory allocations can be properly freed */
   sshc->ssh_session = libssh2_session_init_ex(my_libssh2_malloc,
                                               my_libssh2_free,
                                               my_libssh2_realloc, data);