tagging 2.5.3 deploying a fix for the clear_cache xmlrpc method

git-svn-id: https://plugins.svn.wordpress.org/written/trunk@951214 b8457f37-d9ea-0310-8a92-e5e31aec5664
tagging 2.5.3 correctly

git-svn-id: https://plugins.svn.wordpress.org/written/trunk@951215 b8457f37-d9ea-0310-8a92-e5e31aec5664