updated to work with either prefork or the pthread mpms.

I've been using specialized versions of this for ages.  Time to commit it.
If nobody objects, I'd like to rename it highperformance-std.conf, so
make install will find it and do Good Things.
PR:
Obtained from:
Submitted by:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87736 13f79535-47bb-0310-9956-ffa450edef68