[From xcb.c]
 /*
  * xcb: Copyright (C) 1992,1993,1994 by Farrell McKay.
  * XView modifications provided by Danny Vanderryn.
  * mb/utf8 support by Marc Lehmann <pcg@goof.com>.
  *
  * Simple X interface to the cut buffers in an X server.
  * The program creates a window subdivided into a number of subwindows,
  * one per cut buffer.  The user may copy cut buffer contents around
  * using mouse buttons 1 and 2, or rotate the buffers using mouse
  * button 3.  Buffers may be cleared by using Shift-button 2.
  *
  * Note that this program assumes the cut buffers contain textual
  * information, and displays buffer contents using the XDrawString
  * function.  It is not suitable for use in any other environment.
  *
  * Permission to use, copy, modify, and distribute this software and its
  * documentation for any purpose and without fee is hereby granted, provided
  * that the above copyright notice appears in all copies and that both that
  * copyright notice and this permission notice appear in supporting
  * documentation.  This software is provided "as is" without express or
  * implied warranty.
  */ 

This package is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This package is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

On Debian systems, the complete text of the GNU General
Public License can be found in "/usr/share/common-licenses/GPL-2".