Copyright for sunclock source package in Xenial

This package was debianized by Roland Rosenfeld  on
Fri, 23 Oct 1998 17:14:14 +0200.

It was downloaded from
ftp://ftp.x.org/contrib/applications/sunclock-1.4.tar.gz
ftp://ftp.dent.med.uni-muenchen.de/pub/wmglo/sunclock-1.5.tar.gz
http://frmas.free.fr/files/sunclock-3.53.tar.bz2
ftp://ftp.ac-grenoble.fr/ge/geosciences/sunclock/sunclock-3.56.tar.bz2
http://www.arvernes.com/files/jpd/sunclock-3.57.tar.bz2
https://github.com/mdoege/Sunclock

Upstream Author: John  Mackin 
Upstream maintainer: Jean-Pierre Demailly 

Copyright:

/*****************************************************************************
 *
 * Sun clock version 3.xx by Jean-Pierre Demailly
 *
 * Is derived from the previous versions whose notices appear below.
 * See CHANGES for more explanation on the (quite numerous changes and
 * improvements). Version 3.xx is now published under the GPL.
 */

/*****************************************************************************
 *
 * Sun clock.  X11 version by John Mackin.
 *
 * This program was derived from, and is still in part identical with, the
 * Suntools Sun clock program whose author's comment appears immediately
 * below.  Please preserve both notices.
 *
 * The X11R3/4 version of this program was written by John Mackin, at the
 * Basser Department of Computer Science, University of Sydney, Sydney,
 * New South Wales, Australia; .  This program, like
 * the one it was derived from, is in the public domain: `Love is the
 * law, love under will.'
 */

/*****************************************************************************

	Sun clock

	Designed and implemented by John Walker in November of 1988.

	Version for the Sun Workstation.

    The algorithm used to calculate the position of the Sun is given in
    Chapter 18 of:

    "Astronomical  Formulae for Calculators" by Jean Meeus, Third Edition,
    Richmond: Willmann-Bell, 1985.  This book can be obtained from:

       Willmann-Bell
       P.O. Box 35025
       Richmond, VA  23235
       USA
       Phone: (804) 320-7016

    This program was written by:

       John Walker
       Autodesk, Inc.
       2320 Marinship Way
       Sausalito, CA  94965
       USA
       Fax:   (415) 389-9418
       Voice: (415) 332-2344 Ext. 2829
       Usenet: {sun,well,uunet}!acad!kelvin
	   or: kelvin@acad.uu.net

    modified for interactive maps by

	Stephen Martin
	Fujitsu Systems Business of Canada
	smartin@fujitsu.ca

    This  program is in the public domain: "Do what thou wilt shall be the
    whole of the law".  I'd appreciate  receiving  any  bug  fixes  and/or
    enhancements,  which  I'll  incorporate  in  future  versions  of  the
    program.  Please leave the original attribution information intact	so
    that credit and blame may be properly apportioned.
*/

readgif.c:
/* +-------------------------------------------------------------------+ */
/* | Copyright 1990, 1991, 1993 David Koblas.                          | */
/* | Copyright 1996 Torsten Martinsen.                                 | */
/* |   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 appear 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.           | */
/* +-------------------------------------------------------------------+ */

readpng.c:
/* +-------------------------------------------------------------------+ */
/* | This file is derived from                                         | */
/* | Xpaint's readPNG routines, copyrighted                            | */
/* | by Greg Roelofs (newt@pobox.com)                                  | */
/* |                                                                   | */
/* | Permission to use, copy, modify, and to distribute this software  | */
/* | and its documentation for any purpose is hereby granted without   | */
/* | fee, provided that the above copyright notice appear in all       | */
/* | copies and that both that copyright notice and this permission    | */
/* | notice appear in supporting documentation.  There is no           | */
/* | representations about the suitability of this software for        | */
/* | any purpose.  this software is provided "as is" without express   | */
/* | or implied warranty.                                              | */
/* |                                                                   | */
/* +-------------------------------------------------------------------+ */

The complete GPL can be found in /usr/share/common-licenses/GPL-2.