COPYING, NOTICE: Simplification for autotools-generated files

autotools-generated files can be included under the license of the
upstream code, and FSF copyright added to upstream copyright
list. Simplified debian/copyright appropriately.

Author: tillkamppeter

COPYING

@@ -6,6 +6,7 @@ Source: http://www.openprinting.org/download/libppd/
 Files: *
 Copyright: 2011-2022 OpenPrinting
  1993-2007 Easy Software Products
+ 1996-2023 Free Software Foundation, Inc.
  2003-2015 Tim Waugh
  2003-2006 Red Hat, Inc.
  2006-2012 BBR Inc.
@@ -33,10 +34,6 @@ Copyright: 2011-2022 OpenPrinting
  2022 Sachin Thakan
 Licence: Apache-2.0-with-GPL2-LGPL2-Exception
 
-Files: ltmain.sh
-Copyright: 1996-2001, 2003-2011 Free Software Foundation, Inc.
-License: GPL-2+
-
 License: Apache-2.0-with-GPL2-LGPL2-Exception
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
@@ -64,13 +61,3 @@ License: Apache-2.0-with-GPL2-LGPL2-Exception
  prospectively choose to deem waived or otherwise exclude such Section(s) of
  the License, but only in their entirety and only with respect to the Combined
  Software.
-
-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; version 2 dated June, 1991, or (at
- your option) any later version.
- .
- On Debian systems, the complete text of version 2 of the GNU General
- Public License can be found in '/usr/share/common-licenses/GPL-2'.
-

NOTICE

@@ -2,6 +2,7 @@ libppd
 
 Copyright © 2011-2022 OpenPrinting
 Copyright © 1993-2007 Easy Software Products
+Copyright © 1996-2023 Free Software Foundation, Inc.
 Copyright © 2003-2015 Tim Waugh
 Copyright © 2003-2006 Red Hat, Inc.
 Copyright © 2006-2012 BBR Inc.