Prioritize warning about user settings. Make recommendations for

screen number more generic.   Remove resolution recommendation.

files/settings-default.cfg

@@ -1,3 +1,6 @@
+# WARNING: Editing this file might have no effect, as these settings
+# are overwritten by your user settings file.
+#
 # This file provides minimal documentation for each setting, and
 # ranges of recommended values.  For detailed explanations of the
 # significance of each setting, interaction with other settings, hard
@@ -6,9 +9,6 @@
 # 
 #   https://wiki.openmw.org/index.php?title=Settings
 #
-# The version of this file that actually controls the behavior of
-# OpenMW is user specific, and it's location can be found in the
-# documentation above.  This file is probably NOT that file...
 
 [Camera]
 
@@ -167,14 +167,14 @@ voice volume = 0.8
 
 [Video]
 
-# Resolution of the Open window or screen.  (600 to 2560).
+# Resolution of the Open window or screen.
 resolution x = 800
 resolution y = 600
 
 # OpenMW takes complete control of the screen.
 fullscreen = false
 
-# Determines which screen OpenMW is on.  (0 or 1).
+# Determines which screen OpenMW is on.  (>=0).
 screen = 0
 
 # Minimize OpenMW if it loses cursor or keyboard focus.