mod_cache: Use the actual URI path and query-string for identifying the

cached entity (key), such that rewrites are taken into account when
running afterwards (CacheQuickHandler off).  PR 21935.
 


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1756553 13f79535-47bb-0310-9956-ffa450edef68