* mod_disk_cache, mod_mem_cache: don't cache incomplete responses,

      per RFC 2616, 13.8.
          PR 15866
              Trunk Patch: http://svn.apache.org/viewvc?rev=818492&view=rev
                               http://svn.apache.org/viewvc?rev=821763&view=rev
                                   2.2.x Patch: http://people.apache.org/~poirier/PR15866-22x.patch
                                       +1: poirier, rpluem, rjung, jim




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@892260 13f79535-47bb-0310-9956-ffa450edef68