libosmo-gsup-client: License is GPLv2-or-later

Fix the unintentional AGPLv3-or-later license header in gsup_client.c

Change-Id: I6378bd59fdbe8d95cd6132a1cbc40ae29b558c42
diff --git a/src/gsupclient/gsup_client.c b/src/gsupclient/gsup_client.c
index a7fdc5f..d34a22d 100644
--- a/src/gsupclient/gsup_client.c
+++ b/src/gsupclient/gsup_client.c
@@ -7,16 +7,16 @@
  * Author: Neels Hofmeyr
  *
  * 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
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 Affero General Public License for more details.
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU Affero General Public License
+ * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */