Modify mod_include escaping so a '\' only signifies an escaped

character if the next character is one that needs escaping.

Reviewed by:	Dean Gaudet, Roy Fielding, Marc Slemko
Submitted by:	Ben Laurie


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77636 13f79535-47bb-0310-9956-ffa450edef68