Merge r1458456 from trunk:

Useful extensions...
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1467975 13f79535-47bb-0310-9956-ffa450edef68
Merge r1452281 from trunk:

cache_storage: remove useless test + update function name in debug log + skip as soon as we know headers do not match
Submitted by: jailletc36
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1467976 13f79535-47bb-0310-9956-ffa450edef68