Fixed comment.

Submitted by: fuankg
Backported by: rjung
Reviewed by: fuankg,rjung (CTR docs/comment)

Backport of r1391771 from trunk.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1420101 13f79535-47bb-0310-9956-ffa450edef68