mod_auth_form: Make sure that get_notes_auth() sets the user as does

get_form_auth() and get_session_auth(). Makes sure that REMOTE_USER
does not vanish during mod_include driven subrequests.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1393152 13f79535-47bb-0310-9956-ffa450edef68