Merge r1776459, r1788508 from trunk:

PR59938: add %{REMOTE_PORT} to the expression parser

Submitted By: Hank Ibell <hwibell gmail.com>


compat note for REMOTE_PORT


Submitted by: covener
Reviewed by: covener, ylavic, jchampion


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1789244 13f79535-47bb-0310-9956-ffa450edef68