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/sim/card_fs_isim.c b/src/sim/card_fs_isim.c
index 1073429..e6ba0d0 100644
--- a/src/sim/card_fs_isim.c
+++ b/src/sim/card_fs_isim.c
@@ -5,6 +5,8 @@
  *
  * 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
diff --git a/src/sim/card_fs_sim.c b/src/sim/card_fs_sim.c
index 1411129..f66e391 100644
--- a/src/sim/card_fs_sim.c
+++ b/src/sim/card_fs_sim.c
@@ -5,6 +5,8 @@
  *
  * 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
diff --git a/src/sim/card_fs_tetra.c b/src/sim/card_fs_tetra.c
index 80f3284..7bf0279 100644
--- a/src/sim/card_fs_tetra.c
+++ b/src/sim/card_fs_tetra.c
@@ -5,6 +5,8 @@
  *
  * 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
diff --git a/src/sim/card_fs_uicc.c b/src/sim/card_fs_uicc.c
index 8ff8936..af6061c 100644
--- a/src/sim/card_fs_uicc.c
+++ b/src/sim/card_fs_uicc.c
@@ -5,6 +5,8 @@
  *
  * 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
diff --git a/src/sim/class_tables.c b/src/sim/class_tables.c
index fcf67f0..593b2e8 100644
--- a/src/sim/class_tables.c
+++ b/src/sim/class_tables.c
@@ -3,6 +3,8 @@
 /*
  * (C) 2016 by Harald Welte <laforge@gnumonks.org>
  *
+ * 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 version 2, or
  *  any later version as published by the Free Software Foundation.
diff --git a/src/sim/core.c b/src/sim/core.c
index 8da839c..a78cecc 100644
--- a/src/sim/core.c
+++ b/src/sim/core.c
@@ -5,6 +5,8 @@
  *
  * 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
diff --git a/src/sim/reader.c b/src/sim/reader.c
index f39829b..d1a9ae6 100644
--- a/src/sim/reader.c
+++ b/src/sim/reader.c
@@ -5,6 +5,8 @@
  *
  * 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
diff --git a/src/sim/reader_pcsc.c b/src/sim/reader_pcsc.c
index 5b29638..f22103f 100644
--- a/src/sim/reader_pcsc.c
+++ b/src/sim/reader_pcsc.c
@@ -5,6 +5,8 @@
  *
  * 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