Add null-cancelling script

cfg/_settings.cfg

@@ -42,6 +42,11 @@ alias MUSIC_PLAYER "music_on"
 // the Team videos.
 alias MUSIC_PLAYER_CLASSES "music_classes_off"
 
+// NULL_CANCELLING
+// Values: null_on | null_off
+// If set to null_on, null-cancelling movement is active.
+alias NULL_CANCELLING null_on
+
 // SHOW_NETGRAPH
 // Values: netgraph_on | netgraph_off
 // Shows the netgraph when the user press Tab.