trx_{vty,rate_ctr}: Set proper license AGPLv3+

Take the chance to improve text with author, SPDX tag and fix incorrect
copyright dates.

Related: OS#3515
Change-Id: Ic745312ed07db205b1cdc0f2fa130000319354c5
diff --git a/CommonLibs/trx_rate_ctr.cpp b/CommonLibs/trx_rate_ctr.cpp
index d98caff..43e4189 100644
--- a/CommonLibs/trx_rate_ctr.cpp
+++ b/CommonLibs/trx_rate_ctr.cpp
@@ -2,21 +2,23 @@
  * Copyright (C) 2019 sysmocom - s.f.m.c. GmbH
  * All Rights Reserved
  *
+ * SPDX-License-Identifier: AGPL-3.0+
+ *
  * Author: Pau Espin Pedrol <pespin@sysmocom.de>
  *
- * 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
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Affero General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
+ * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
+ * See the COPYING file in the main directory for details.
  */
 
 /*
diff --git a/CommonLibs/trx_vty.c b/CommonLibs/trx_vty.c
index 795ec7b..e184f49 100644
--- a/CommonLibs/trx_vty.c
+++ b/CommonLibs/trx_vty.c
@@ -1,20 +1,24 @@
 /*
- * Copyright (C) 2012-2017 sysmocom - s.f.m.c. GmbH
+ * Copyright (C) 2018-2019 sysmocom - s.f.m.c. GmbH
  * All Rights Reserved
  *
- * 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
+ * SPDX-License-Identifier: AGPL-3.0+
+ *
+ * Author: Pau Espin Pedrol <pespin@sysmocom.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Affero General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
+ * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
+ * See the COPYING file in the main directory for details.
  */
 
 #include <string.h>