add copyright statement and AGPLv3 headers to source code files
diff --git a/src/rua_common.c b/src/rua_common.c
index 8f4da12..554896b 100644
--- a/src/rua_common.c
+++ b/src/rua_common.c
@@ -1,3 +1,24 @@
+/* common RUA (RANAP User Adaption) Code */
+
+/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
+ * All Rights Reserved
+ *
+ * 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 Affero General Public License for more details.
+ *
+ * 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/>.
+ *
+ */
+
+
#include <stdint.h>
#include <osmocom/core/msgb.h>