KBRESET - Reset keyboard shift status

Usage : KBRESET

Some programs, games in particular, leave the keyboard NumLock key in  a
confusing  state:  the  light is off, but the NumLock state is on. Quite
annoying. The same thing can happen to the other 'shift' keys.

KBRESET resets the state ofthe following keys:
  NumLock
  ScrollLock
  CapsLock
  Insert
