Rewrote config tree walk using recursion the way God intended.

Added ?config option. Added printout of config filename and line numbers.

PR: 30919
Submitted by: Rici Lake <rici ricilake.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@104942 13f79535-47bb-0310-9956-ffa450edef68