Merge r681204 from trunk:

* Give possible piped loggers a chance to process their input before they get
  killed by us.

Submitted by: rpluem
Reviewed by: rpluem, jim, gregames


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@695026 13f79535-47bb-0310-9956-ffa450edef68