Generate #LoadModule directive in default httpd.conf for every --enable-mpms-shared. PR 53882.

Submitted by: olli hauer <ohauer gmx.de>
Commited by: ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1652930 13f79535-47bb-0310-9956-ffa450edef68