Improve help for --enable-modules= and --enable-mods-shared= by showing the...

Improve help for --enable-modules= and --enable-mods-shared= by showing the alternative 'all' and 'most' meta-module


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102189 13f79535-47bb-0310-9956-ffa450edef68