[license] add license header

src/teleport-server.c

@@ -1,3 +1,21 @@
+/* teleport-server.c
+ *
+ * Copyright 2017 Julian Sparber <julian@sparber.com>
+ *
+ * Teleport 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 <errno.h>
 #include <stdio.h>
 #include <stdlib.h>