Make scoreboard creation a hook. This allows management

modules to have access to the scoreboard at the time that it is
created, and at every restart request.
Submitted by:	Cody Sherr <csherr@covalent.net>
Reviewed by:	Ryan Bloom


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@89608 13f79535-47bb-0310-9956-ffa450edef68