Add -DDUMP_INCLUDES configtest option to show the tree

of Included configuration files.  


Example:

    Included configuration files:
      (*) .../conf/httpd.conf
        (517) .../conf/extra/proxy-html.conf
          (91) /dev/null



Submitted By: Jacob Champion <champion.pxi gmail.com>
Committed By: covener





git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1747808 13f79535-47bb-0310-9956-ffa450edef68