Add some detail on which is which. I prefer

#1 since I don't like the idea of 'assuming' http. #3 is a bit
much for 1.3.18, but should be looked at after we release


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@88201 13f79535-47bb-0310-9956-ffa450edef68