Clean up httpd -V output: Instead of displaying the MPM source

directory, display the MPM name and some MPM properties.

Submitted by: Geoffrey Young <geoff apache.org>
Reviewed by:  Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101978 13f79535-47bb-0310-9956-ffa450edef68