Add mod_status hook to allow modules to add to the mod_status

report.

Submitted by:	Joe Orton
Reviewed by:	trawick, ianh, jerenkrantz


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@102123 13f79535-47bb-0310-9956-ffa450edef68