+ """Get the current user based on the SSL or GSSAPI environment
+variables and store it in the request object's login variable. This
+conforms to the CherryPy API:
+http://www.cherrypy.org/wiki/RequestObject#login
+
+If the user is logged in successfully, cherrypy.request.login is set
+to the username. If the user failed to log in, cherrypy.request.login
+is set to False. If the user did not attempt authentication,
+cherrypy.request.login is set to None."""