Force the dav/fs config.m4 file to be added to the configure script after

the dav/main config.m4.  This script should make sure that dav is enabled
before turning on dav/fs, but I leave that for somebody else to do.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88828 13f79535-47bb-0310-9956-ffa450edef68