Merge r1230065 from trunk (adapted to avoid MMN change):

Merge r1230065 from trunk (adapted to avoid MMN change):

SECURITY (CVE-2012-0031): Fix possible crash on shutdown if a child
changes the sb_type field in the scoreboard.  Since unprivileged
children should not be able to affect the parent in this way, this is
treated as a Low severity security issue.

Thanks to "halfdog" <me halfdog.net> for reporting this issue.

* server/scoreboard.c (ap_cleanup_scoreboard, ap_create_scoreboard):
  Use a static global to store an authoritative copy of the scoreboard
  type.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1230069 13f79535-47bb-0310-9956-ffa450edef68