Merge r1555116 from trunk:

emphasize that this is mostly just AAA checks and not the status
code of the handler. PR21828 and various dups.




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1555120 13f79535-47bb-0310-9956-ffa450edef68