Switch to machine-readable copyright

Also document the licensing of generated output (Debathena: #1567).

Author: geofft

debian/copyright

@@ -1,22 +1,57 @@
-Authors: Tim Abbott <tabbott@mit.edu>
-         Anders Kaseorg <andersk@mit.edu>
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Source: https://github.com/sipb/config-package-dev
+Upstream-Contact: Debathena Project <debathena@mit.edu>
 
-The upstream location for this software is now the Debian archive.
+Files: *
+Copyright: (C) Tim Abbott <tabbott@mit.edu> 2006-2010
+           (C) Anders Kaseorg <andersk@mit.edu> 2006-2012
+           (C) Geoffrey Thomas <geofft@mit.edu> 2011-2017
+           (C) Jonathan Reed <jdreed@mit.edu> 2013
+License: GPL-2+
+ This program 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 program 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.
+ .
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in the file /usr/share/common-licenses/GPL-2.
 
-It is also available from https://debathena.mit.edu/config-package-dev
+Files: displace.sh.in
+Copyright: © 2008–2012 Tim Abbott <tabbott@mit.edu> and Anders Kaseorg <andersk@mit.edu>
+License: Expat
+Comment: This file is copied into packages generated by
+ config-package-dev. It includes the copyright statement and license
+ text, so that packages using config-package-dev should not need to do
+ anything else to comply with the license and are not required to be
+ GPL-compatible just because they use config-package-dev.
 
-Copyright: (C) Tim Abbott and Anders Kaseorg 2006-2008
-           (C) Geoffrey Thomas 2011-2013
+Files: examples/*
+Copyright: © 2008 Tim Abbott <tabbott@mit.edu>
+           © 2012 Geoffrey Thomas <geofft@mit.edu>
+License: Expat
 
-  This program 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 program 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.
-
-On Debian systems, the complete text of the GNU General Public License
-can be found in the file /usr/share/common-licenses/GPL-2.
+License: Expat
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the “Software”), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+ .
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+ .
+ THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.