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.
PR:
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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@90779 13f79535-47bb-0310-9956-ffa450edef68