docs: fix broken links (1.1-maint)

docs/development.rst

@@ -50,8 +50,7 @@ Branching model
 
 Borg development happens on the ``master`` branch and uses GitHub pull
 requests (if you don't have GitHub or don't want to use it you can
-send smaller patches via the borgbackup `Mailing List<https://borgbackup.org/support/free.html#_mailing_list>`_.
-to the maintainers).
+send smaller patches via the borgbackup mailing list to the maintainers).
 
 Stable releases are maintained on maintenance branches named x.y-maint, eg.
 the maintenance branch of the 1.0.x series is 1.0-maint.

docs/support.rst

@@ -1,3 +1,5 @@
+.. _support:
+
 Support
 =======