Move MAGIC_MODULE_NUMBER history into ap_mmn.h.

Submitted by:	Randy Terbush <randy@covalent.net>
Reviewed by:	Martin Kraemer, Jim Jagielski


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81927 13f79535-47bb-0310-9956-ffa450edef68