Rename OpenGGSN to OsmoGGSN

Osmocom has maintained this program since about 7 years now, while
the original author / copyright holder has completely disappeared.

With the introduction of Osmocom-style CTRL and VTY interfaces,
the way how the program is used and configured has substantially
changed.  In order to avoid confusion in terms of configuration file
format etc, let's rename it to OsmoGGSN.

Change-Id: I2da30f7d4828e185bfac1a4e2d8414b01cbe4f9d
diff --git a/debian/copyright b/debian/copyright
index b3339d9..a6507bd 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,11 +1,13 @@
 Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: openggsn
-Source: http://sourceforge.net/projects/ggsn/
+Upstream-Name: osmo-ggsn
+Source: https://osmocom.org/projects/openggsn
 
 Files: *
-Copyright: 2002      Jens Jakobsen <jj@openggsn.org>
-           2002-2004 Mondru AB
-           2010-2011 Harald Welte <laforge@gnumonks.org>
+Copyright (C) 2002-2004 Mondru AB, Author: Jens Jakobsen <jj@openggsn.org>
+Copyright (C) 2010-2017 Harald Welte <laforge@gnumonks.org>
+Copyright (C) 2012-2016 Holger Hans Peter Freyther <zecke@selfish.org>
+Copyright (C) 2014-2016 Pablo Neira Ayuso <pablo@gnumonks.org>
+Copyright (C) 2014-2016 sysmocom - s.f.m.c. GmbH
 License: GPL-2
 
 Files: lib/getopt.c
@@ -15,7 +17,7 @@
 License: LGPL-2.1+
 
 Files: debian/*
-Copyright: 2010-2015  Harald Welte <laforge@gnumonks.org>
+Copyright: 2010-2017  Harald Welte <laforge@gnumonks.org>
            2016       Ruben Undheim <ruben.undheim@gmail.com>
 License: GPL-2