Merge branch 'dev' (Mongoose 6.12)

Author: rojer

README.md

@@ -62,7 +62,7 @@ the functionality:
 # Contributions
 
 To submit contributions, sign [Cesanta CLA](https://cesanta.com/cla.html)
-and send GitHub pull request. You retain the copyright on your contributions.
+and send GitHub pull request.
 
 # Looking for a pre-compiled Mongoose web server Windows or Mac binary?
 - [Download pre-compiled Mongoose web server binary.](https://www.cesanta.com/binary.html)

docs/c-api/mg_util.h/mg_url_encode.md

@@ -6,8 +6,5 @@ signature: |
   struct mg_str mg_url_encode(const struct mg_str src);
 ---
 
-URL-escape the specified string.
-All non-printable characters are escaped, plus `._-$,;~()/`.
-Input need not be NUL-terminated, but the returned string is.
-Returned string is heap-allocated and must be free()'d. 
+Same as `mg_url_encode_opt(src, "._-$,;~()/", 0)`.