As per discussion on users@httpd.apache.org and a little on IRC, clarify

that "third party" modules can do basically whatever they want, and
typically do it as the "User" uid, so Caveat Administrator


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97435 13f79535-47bb-0310-9956-ffa450edef68