Merge r1601624 from trunk:

Strip useless apr_brigade_cleanup() calls.

Submitted/backported by: ylavic
Reviewed by: jailletc36, jim, ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1734391 13f79535-47bb-0310-9956-ffa450edef68