* fd is no member of disk_cache_object_t. Instead it is a member of

  disk_cache_file_t. Close all fd's (fd, tempfd) for all cache elements
  (hdrs, data, vary) if they are present.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1405856 13f79535-47bb-0310-9956-ffa450edef68