Add a little detail about merging of .htaccess with httpd.conf,

and provide an example to enforce certain settings.

PR: 31782
Submitted by: Ray Ferguson <ferguson berbee.com>, Joshua Slive


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@167970 13f79535-47bb-0310-9956-ffa450edef68