mod_cache: Revert http://svn.apache.org/viewvc?view=revision&revision=1070179

as per the following thread:
http://www.gossamer-threads.com/lists/apache/dev/395830?do=post_view_threaded#395830


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1208384 13f79535-47bb-0310-9956-ffa450edef68