Update the htcacheclean init script to take into account the pid of

the running htcacheclean process. This enables htcacheclean to be
enabled more than once to clean multiple caches on the same machine.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@910791 13f79535-47bb-0310-9956-ffa450edef68