Merge r434483 from trunk:

* Close connection to backend if reading of request body fails.

PR: 40310
Submitted by: Ian Abel <ianabel mxtelecom.com>
Reviewed by: rpluem

Submitted by: rpluem
Reviewed by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@437748 13f79535-47bb-0310-9956-ffa450edef68