added official support forum

git-svn-id: https://plugins.svn.wordpress.org/404-to-301/trunk@961507 b8457f37-d9ea-0310-8a92-e5e31aec5664
added official support forum

git-svn-id: https://plugins.svn.wordpress.org/404-to-301/trunk@961508 b8457f37-d9ea-0310-8a92-e5e31aec5664