Backport a comment from Greg Ames in trunk which helps

clarify part of this backport from 10 days ago:

  http://svn.apache.org/viewcvs.cgi?rev=390548&view=rev
  


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@393120 13f79535-47bb-0310-9956-ffa450edef68