Graceful restarts, reliable signals, and memory fixes.

Reviewed by:	Paul S., Roy, (and others reviewed earlier incarnations)
Submitted by:
Obtained from:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78005 13f79535-47bb-0310-9956-ffa450edef68