Merge r1351016 from trunk:

pass the provider name to parse_require_line as pool userdata

This allows a single C function to implement several authz providers.

Submitted by: sf
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1368451 13f79535-47bb-0310-9956-ffa450edef68