cosmetic: Update copyright statement, license notice and SPDX
Some of our files didn't have a copyright notice at all, let's add
it. Also, update the notices in other files and ensure a SPDX
identifier is present in all but the most trivial files.
Change-Id: If7fa19ce484b415bc645e39b3d0d666b44b5f0fd
diff --git a/library/GTP_CodecPort.ttcn b/library/GTP_CodecPort.ttcn
index 7a3e755..a8507a6 100644
--- a/library/GTP_CodecPort.ttcn
+++ b/library/GTP_CodecPort.ttcn
@@ -1,5 +1,14 @@
-/* dual-faced port sitting on top of IPL4_asp UDP to encode/decode GTP */
-/* (C) 2017 by Harald Welte <laforge@gnumonks.org */
+/* dual-faced port sitting on top of IPL4_asp UDP to encode/decode GTP
+ * (C) 2017 Harald Welte <laforge@gnumonks.org>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+
module GTP_CodecPort {
import from IPL4asp_PortType all;
import from IPL4asp_Types all;