From Mark Cox:

I've had a couple of emails from users using mod_usertrack for authentication.
Add the equivalent of a "warning: coffee may be hot" label, and fix a broken
email address at the same time.

Submitted by:	Mark Cox


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@90780 13f79535-47bb-0310-9956-ffa450edef68