remove keep alive

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@901067 b8457f37-d9ea-0310-8a92-e5e31aec5664
remove keep alive

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@901068 b8457f37-d9ea-0310-8a92-e5e31aec5664
keep alive has been added

git-svn-id: https://plugins.svn.wordpress.org/wp-fastest-cache/trunk@901070 b8457f37-d9ea-0310-8a92-e5e31aec5664