Merge r785457 from trunk:

Fix bug in r785425 (dereference null pointer when not configured)
and add a couple of comments.

Submitted by: niq
Reviewed by: rpluem, niq, rjung


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@963220 13f79535-47bb-0310-9956-ffa450edef68