Fixes problems with origin server connection close if client dies

Fixes CacheForceCompletion directive
PR: 7383, 8067, 8090
Obtained from: 	Alexey Panchenko <panchenko@liwest.ru>
Submitted by:	Alexey Panchenko <panchenko@liwest.ru>
Reviewed by:	Chuck Murcko


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@91128 13f79535-47bb-0310-9956-ffa450edef68