Only let the "suEXEC enabled" message be printed once, even when we

have a DSO that goes through the load-unload-load cycle.

Suggested by:	Ryan Morgan <rmorgan@covalent.net>, Cliff Woolley


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92256 13f79535-47bb-0310-9956-ffa450edef68