Add the ability for mod_include to add the INCLUDES filter

if the file is configured for the server-parsed handler.
This makes the configuration for .shtml files much easier
to understand, and allows mod_include to honor Apache 1.3
config files.   Based on Doug MacEachern's patch to PHP
to do the same thing.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@90655 13f79535-47bb-0310-9956-ffa450edef68