RPM init script: 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/branches/2.2.x@1004268 13f79535-47bb-0310-9956-ffa450edef68