! Copyright (c) 1990-1997  Michael Sandrof, Troy Rollo, Matthew Green,
! and other ircII contributors.
!
! All rights reserved.  See the HELP IRCII COPYRIGHT file for more
! information.
!
Usage: CLEAR [-ALL] [-UNHOLD]
  Clears the current window.
  If the -ALL flag is used, clears all visible windows.
  If the -UNHOLD flag is used, unholds a window.
