CURLOPT_FOLLOWLOCATION.3: mention methods for redirects

and some general cleaning up

docs/libcurl/opts/CURLOPT_FOLLOWLOCATION.3

@@ -28,24 +28,31 @@ CURLOPT_FOLLOWLOCATION \- follow HTTP 3xx redirects
 
 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FOLLOWLOCATION, long enable);
 .SH DESCRIPTION
-A parameter set to 1 tells the library to follow any Location: header that the
-server sends as part of a HTTP header in a 3xx response.
+A long parameter set to 1 tells the library to follow any Location: header
+that the server sends as part of a HTTP header in a 3xx response. The
+Location: header can specify a relative or an absolute URL to follow.
 
-This means that libcurl will re-send the same request on the new location and
-follow new Location: headers all the way until no more such headers are
-returned. \fICURLOPT_MAXREDIRS(3)\fP can be used to limit the number of
-redirects libcurl will follow.
+libcurl will issue another request for the new URL and follow new Location:
+headers all the way until no more such headers are returned.
+\fICURLOPT_MAXREDIRS(3)\fP can be used to limit the number of redirects
+libcurl will follow.
 
-libcurl can limit to what protocols it will automatically follow. The accepted
+libcurl limits what protocols it automatically follows to. The accepted
 protocols are set with \fICURLOPT_REDIR_PROTOCOLS(3)\fP. By default libcurl
-will allow all protocols on redirect except several disabled for security
+will allow all protocols on redirect except those disabled for security
 reasons: Since 7.19.4 FILE and SCP are disabled, and since 7.40.0 SMB and SMBS
 are also disabled.
 
+When following a Location:, the 3xx response code that redirected it also
+dictates which request method it will use in the subsequent request: For 301,
+302 and 303 responses libcurl will switch method to GET unless
+\fICURLOPT_POSTREDIR(3)\fP instructs libcurl otherwise. All other 3xx codes
+will make libcurl send the same method again.
+
 For users who think the existing location following is too naive, too simple
 or just lacks features, it is very easy to instead implement your own redirect
 follow logic with the use of \fIcurl_easy_getinfo(3)\fP's
-\fICURLINFO_REDIRECT_URL\fP option instead of using
+\fICURLINFO_REDIRECT_URL(3)\fP option instead of using
 \fICURLOPT_FOLLOWLOCATION(3)\fP.
 .SH DEFAULT
 0, disabled