Fix trailing backslashes in configuration directives.

PR: 34834
Submitted by: Timo Viipuri <viipuri dlc.fi>
Reviewed by: Paul Querna


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@178209 13f79535-47bb-0310-9956-ffa450edef68