URL parser: IPv6 zone identifiers are now supported

docs/KNOWN_BUGS

@@ -180,16 +180,7 @@ may have been fixed since this was written!
   --cflags suffers from the same effects with CFLAGS/CPPFLAGS.
 
 30. You need to use -g to the command line tool in order to use RFC2732-style
-  IPv6 numerical addresses in URLs.
-
-29. IPv6 URLs with zone ID is not nicely supported.
-  http://www.ietf.org/internet-drafts/draft-fenner-literal-zone-02.txt (expired)
-  specifies the use of a plus sign instead of a percent when specifying zone
-  IDs in URLs to get around the problem of percent signs being
-  special. According to the reporter, Firefox deals with the URL _with_ a
-  percent letter (which seems like a blatant URL spec violation).
-  libcurl supports zone IDs where the percent sign is URL-escaped (i.e. %25):
-  http://curl.haxx.se/bug/view.cgi?id=555
+  or RFC6874-style IPv6 numerical addresses in URLs.
 
 26. NTLM authentication using SSPI (on Windows) when (lib)curl is running in
   "system context" will make it use wrong(?) user name - at least when compared

docs/MANUAL

@@ -956,9 +956,9 @@ IPv6
   When this style is used, the -g option must be given to stop curl from
   interpreting the square brackets as special globbing characters.  Link local
   and site local addresses including a scope identifier, such as fe80::1234%1,
-  may also be used, but the scope portion must be numeric and the percent
-  character must be URL escaped. The previous example in an SFTP URL might
-  look like:
+  may also be used, but the scope portion must be numeric or match an existing
+  network interface on Linux and the percent character must be URL escaped. The
+  previous example in an SFTP URL might look like:
 
     sftp://[fe80::1234%251]/