Convert debian/copyright to the machine-readable format

debian/copyright

@@ -1,30 +1,24 @@
-This package was debianized by Giacomo A. Catenazzi <cate@debian.org> on
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Tue, 28 Aug 2007 19:09:53 +0200.
-
-It was downloaded from http://g15tools.sourceforge.net/
-
-Upstream Authors: 
-    Philip Lawatsch <philip@lawatsch.at>
-    Alex Ibrado <alex@ibrado.org>
-    Anthony J. Mirabella <mirabeaj@gmail.com>
-    Mike Lampard <mlampard@users.sf.net>
 
+Files: *
 Copyright:
+ 2006, 2007 Philip Lawatsch <philip@lawatsch.at>,
+            Alex Ibrado <alex@ibrado.org>,
+            Anthony J. Mirabella <mirabeaj@gmail.com>,
+            Mike Lampard <mlampard@users.sf.net>
+ 2008—2009 The G15Tools project
+License: GPL-2+
 
-    Copyright (C) 2006,2007	Philip Lawatsch <philip@lawatsch.at>
+Files: debian/*
-				Alex Ibrado <alex@ibrado.org>
+Copyright:
-				Anthony J. Mirabella <mirabeaj@gmail.com>
+ 2007, 2009 Giacomo A. Catenazzi <cate@debian.org>
-				Mike Lampard <mlampard@users.sf.net>
+ 2019       Alexander Ponyatykh <lazyranma@gmail.com>
-License:
+License: GPL-2+
-
-    g15tools 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.
-
-License can be found in the file `/usr/share/common-licenses/GPL-2'.
-
-The Debian packaging is (C) 2007, Giacomo A. Catenazzi <cate@debian.org>,
-                        (C) 2019, Alexander Ponyatykh <lazyranma@gmail.com> and
-is licensed under the GPL v2 (or later), see `/usr/share/common-licenses/GPL-2'.
 
+License: GPL-2+
+ g15tools 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.
+ .
+ License can be found in the file `/usr/share/common-licenses/GPL-2'.