Fix a race condition found by David Colasurdo <davecola@us.ibm.com>. We

should make sure that the parent notes the creation of a child process
in the scoreboard so that perform_idle_server_maintanence doesn't get
the chance to claim that slot.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84116 13f79535-47bb-0310-9956-ffa450edef68