Merge r481901 from trunk:

* Ensure that at least scheme://hostname[:port] matches between worker and URL
  when trying to find the worker that fits best to the given URL.

PR: 40910

Submitted by: rpluem
Reviewed by: rpluem, jim, fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@572420 13f79535-47bb-0310-9956-ffa450edef68