+If X11 support is compiled in then the '-X' option can be used to terminate
+wall-notify automatically when the X session quits. This is useful when
+wall-notify is started in `.xinitrc` and should quit when the X session ends,
+i.e the user logs out:
+
+ ./src/wall-notify -X cat
+
+
+By default only messages from root are displayed. To allow messages from other
+users (which includes `rwalld` in most setups) the option '-m' must be used.
+
+