spelling fixes

Detected using the `codespell` tool.

Also contains one URL protocol upgrade.

Closes https://github.com/curl/curl/pull/2334

docs/BINDINGS.md

@@ -95,7 +95,7 @@ Ruby: [curb](https://github.com/taf2/curb) written by Ross Bamford
 
 [Scilab](https://help.scilab.org/docs/current/fr_FR/getURL.html) binding by Sylvestre Ledru
 
-[S-Lang](http://www.jedsoft.org/slang/modules/curl.html) by John E Davis
+[S-Lang](https://www.jedsoft.org/slang/modules/curl.html) by John E Davis
 
 [Smalltalk](http://www.squeaksource.com/CurlPlugin/) Written by Danil Osipchuk
 

docs/FAQ

@@ -218,9 +218,9 @@ FAQ
   very well at the side. Curl's output can be piped into another program or
   redirected to another file for the next program to interpret.
 
-  We focus on protocol related issues and improvements. If you wanna do more
+  We focus on protocol related issues and improvements. If you want to do more
   magic with the supported protocols than curl currently does, chances are good
-  we will agree. If you wanna add more protocols, we may very well agree.
+  we will agree. If you want to add more protocols, we may very well agree.
 
   If you want someone else to do all the work while you wait for us to
   implement it for you, that is not a very friendly attitude. We spend a

docs/MAIL-ETIQUETTE

@@ -179,7 +179,7 @@ MAIL ETIQUETTE
   or just remove them completely from the mail. Note that this includes base64
   encoded HTTP Basic auth headers.
 
-  This public nature of the curl mailing lists makes automaticly inserted mail
+  This public nature of the curl mailing lists makes automatically inserted mail
   footers about mails being "private" or "only meant for the receipient" or
   similar even more silly than usual. Because they are absolutely not private
   when sent to a public mailing list.

docs/cmdline-opts/progress-bar.d

@@ -8,5 +8,5 @@ standard, more informational, meter.
 This progress bar draws a single line of '#' characters across the screen and
 shows a percentage if the transfer size is known. For transfers without a
 known size, there will be space ship (-=o=-) that moves back and forth but
-only while data is being transfered, with a set of flying hash sign symbols on
+only while data is being transferred, with a set of flying hash sign symbols on
 top.

docs/examples/ftpupload.c

@@ -77,7 +77,7 @@ int main(void)
 
   /* get the file size of the local file */
   if(stat(LOCAL_FILE, &file_info)) {
-    printf("Couldnt open '%s': %s\n", LOCAL_FILE, strerror(errno));
+    printf("Couldn't open '%s': %s\n", LOCAL_FILE, strerror(errno));
     return 1;
   }
   fsize = (curl_off_t)file_info.st_size;

docs/libcurl/libcurl-tutorial.3

@@ -856,7 +856,7 @@ discussed. Instead, the only way to have SSL work over a HTTP proxy is to ask
 the proxy to tunnel trough everything without being able to check or fiddle
 with the traffic.
 
-Opening an SSL connection over a HTTP proxy is therefor a matter of asking the
+Opening an SSL connection over a HTTP proxy is therefore a matter of asking the
 proxy for a straight connection to the target host on a specified port. This
 is made with the HTTP request CONNECT. ("please mr proxy, connect me to that
 remote host").

docs/libcurl/opts/CURLINFO_CONDITION_UNMET.3

@@ -31,7 +31,7 @@ CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET, long *unmet);
 Pass a pointer to a long to receive the number 1 if the condition provided in
 the previous request didn't match (see \fICURLOPT_TIMECONDITION(3)\fP). Alas,
 if this returns a 1 you know that the reason you didn't get data in return is
-because it didn't fulfill the condition. The long ths argument points to will
+because it didn't fulfill the condition. The long this argument points to will
 get a zero stored if the condition instead was met.
 .SH PROTOCOLS
 HTTP and some