Fix seg fault when garbage collecting an expired entry. remove_entity

should just remove the object from the cache and set the cleanup flag
in the object. decrement_refcount will clean the object up when the refcount
goes to zero.

Defect reported by Jean-Jacques Clar at Novell.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94683 13f79535-47bb-0310-9956-ffa450edef68