-as config file. If invoked by a regular user, start a screen session
-with users .screenrc config if it exists, else use /etc/grml/screenrc_grml
-as configuration.
+as config file. If invoked by a regular user and users .screenc does not exist,
+starts screen with /etc/grml/screenrc_grml config if it exists, else fallbacks
+to /etc/grml/screenrc.