Copyright for tcl8.6 source package in Focal

This package was originally debianized by David Engel 
from sources obtained at http://prdownloads.sourceforge.net/tcl

List of copyright holders mentioned in individual files:

Copyright 1983, 1987-1994 The Regents of the University of California
Copyright 1992-1999 Karl Lehenbauer and Mark Diekhans
Copyright 1992,1993,1995,1996, Jens-Uwe Mager, Helios Software GmbH
Copyright 1992-1996 Free Software Foundation, Inc.
Copyright 1993-1994 Lockheed Missle & Space Company, AI Center
Copyright 1993-1997 Bell Labs Innovations for Lucent Technologies
Copyright 1993-1998 Lucent Technologies
Copyright 1994-2000 Sun Microsystems, Inc.
Copyright 1995 General Electric Company
Copyright 1995 Dave Nebinger
Copyright 1995-1997 Roger E. Critchlow Jr
Copyright 1996 Lucent Technologies and Jim Ingham
Copyright 1997-2000 Ajuba Solutions
Copyright 1998-2000 Scriptics Corporation
Copyright 1998-1999 Henry Spencer
Copyright 1998 Paul Duffin
Copyright 1998 Mark Harrison
Copyright 1998 Nat Pryce
Copyright 1999 America Online, Inc.
Copyright 1999-2000,2002,2004-2007 Andreas Kupries
Copyright 2000-2001 ActiveState Corporation, et al
Copyright 2001 ActiveState Tool Corp.
Copyright 2001-2002 Apple Computer, Inc.
Copyright 2001-2004 David Gravereaux
Copyright 2001-2004 Vincent Darley
Copyright 2001-2008 Donal K. Fellows
Copyright 2001-2008 ActiveState Corporation
Copyright 2001-2007 Kevin B. Kenny
Copyright 2001-2008 Daniel A. Steffen
Copyright 2002-2007 Miguel Sofer
Copyright 2003 Simon Geard
Copyright 2003-2004 Georgios Petasis
Copyright 2003-2004,2006-2008 Joe Mistachkin
Copyright 2003-2008 Pat Thoyts
Copyright 2004 Zoran Vasiljevic
Copyright 2005,2008 George Peter Staplin
Copyright 2006 Neil Madden
Copyright 2006 Peter Spjuth
Copyright 2008 Tcl Core Team
Contributions from Don Porter, NIST, 2002-2003. (not subject to US copyright)

Copyright:

This software is copyrighted by the Regents of the University of
California, Sun Microsystems, Inc., Scriptics Corporation,
and other parties.  The following terms apply to all files associated
with the software unless explicitly disclaimed in individual files.

The authors hereby grant permission to use, copy, modify, distribute,
and license this software and its documentation for any purpose, provided
that existing copyright notices are retained in all copies and that this
notice is included verbatim in any distributions. No written agreement,
license, or royalty fee is required for any of the authorized uses.
Modifications to this software may be copyrighted by their authors
and need not follow the licensing terms described here, provided that
the new terms are clearly indicated on the first page of each file where
they apply.

IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS SOFTWARE
IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE
NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
MODIFICATIONS.

GOVERNMENT USE: If you are acquiring this software on behalf of the
U.S. government, the Government shall have only "Restricted Rights"
in the software and related documentation as defined in the Federal 
Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2).  If you
are acquiring the software on behalf of the Department of Defense, the
software shall be classified as "Commercial Computer Software" and the
Government shall have only "Restricted Rights" as defined in Clause
252.227-7013 (c) (1) of DFARs.  Notwithstanding the foregoing, the
authors grant the U.S. Government and others acting in its behalf
permission to use and distribute the software in accordance with the
terms specified in this license. 

Several files are distributed under other conditions:

compat/strftime.c:
/*
 * strftime.c --
 *
 *  This file contains a modified version of the BSD 4.4 strftime
 *  function.
 *
 * This file is a modified version of the strftime.c file from the BSD 4.4
 * source.  See the copyright notice below for details on redistribution
 * restrictions.  The "license.terms" file does not apply to this file.
 *
 * Changes 2002 Copyright (c) 2002 ActiveState Corporation.
 *
 * RCS: @(#) $Id: strftime.c,v 1.10.2.3 2005/11/04 18:18:04 kennykb Exp $
 */

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

compat/dlfcn.h and unix/tclLoadAix.c:
 *  This file is subject to the following copyright notice, which is
 *  different from the notice used elsewhere in Tcl but rougly
 *  equivalent in meaning.
 *
 *  Copyright (c) 1992,1993,1995,1996, Jens-Uwe Mager, Helios Software GmbH
 *  Not derived from licensed software.
 *
 *  Permission is granted to freely use, copy, modify, and redistribute
 *  this software, provided that the author is not construed to be liable
 *  for any results of using the software, alterations are clearly marked
 *  as such, and this notice is not modified.