Follow-up to r1939354. Register the extra connection optional functions
from the pre-config hook, and have a child that stops gracefully (on
AP_SIG_GRACEFUL or an idle kill through the pod) wait for the connections
noted by modules before exiting. Ungraceful exits are unchanged.
Add mpm_motorz to the CHANGES entry.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1939355 13f79535-47bb-0310-9956-ffa450edef68