Added copyright notice.

FossilOrigin-Name: 3458581d07592ffdaca4d9a4c393f189f6b2afabdcce345a466502cbf3fbc2f1

src/capwap/cwmsg_addelem_mtu_discovery_padding.c

@@ -1,3 +1,21 @@
+/*
+    This file is part of libcapwap.
+
+    libcapwap 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 3 of the License, or
+    (at your option) any later version.
+
+    libcapwap 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.
+
+    You should have received a copy of the GNU General Public License
+    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
 #include <string.h>
 
 #include "capwap.h"