Clarify license terms on new files.

clients.c

@@ -1,3 +1,20 @@
+/* MiniDLNA media server
+ * Copyright (C) 2013  NETGEAR
+ *
+ * This file is part of MiniDLNA.
+ *
+ * MiniDLNA is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * MiniDLNA 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 MiniDLNA. If not, see <http://www.gnu.org/licenses/>.
+ */
 #include <stdio.h>
 #include <string.h>
 #include <time.h>