complain via error_log when mod_include's INCLUDES filter is

     enabled, but the relevant Options flag allowing the filter to run
     for the specific resource wasn't set, so that the filter won't
     silently get skipped.
PR:
Obtained from:
Submitted by:
Reviewed by:	nd


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101999 13f79535-47bb-0310-9956-ffa450edef68