Give the request_rec some information about path_info allowance.
  If some unnamed filter will consume the path_info, it may set up
  used_path_info to a non-zero value, and core.c will consume the
  request with path_info.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92442 13f79535-47bb-0310-9956-ffa450edef68