Fix/Update copyright notices; Add SPDX annotation
Let's fix some erroneous/accidential references to wrong license,
update copyright information where applicable and introduce a
SPDX-License-Identifier to all files.
Change-Id: I39af26c6aaaf5c926966391f6565fc5936be21af
diff --git a/src/ctrl/control_cmd.c b/src/ctrl/control_cmd.c
index 24b388b..f616479 100644
--- a/src/ctrl/control_cmd.c
+++ b/src/ctrl/control_cmd.c
@@ -3,9 +3,13 @@
/*
* (C) 2010-2011 by Daniel Willmann <daniel@totalueberwachung.de>
* (C) 2010-2011 by On-Waves
+ * (C) 2014 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2017 by sysmocom - s.f.m.c. GmbH
*
* All Rights Reserved
*
+ * SPDX-License-Identifier: GPL-2.0+
+ *
* 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