Merge r1621453 from trunk.

PR56729: mod_reqtimeout gets confused when it sees a read via
check_pipeline() just before a slow HTTP response completes.

Committed By: coverner
Reviewed By: covener, trawick, ylavic
Backported By: ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1678698 13f79535-47bb-0310-9956-ffa450edef68