Add GPLv2 header.
diff --git a/cpu-miner.c b/cpu-miner.c
index 8cf4278..d88e7bb 100644
--- a/cpu-miner.c
+++ b/cpu-miner.c
@@ -1,7 +1,10 @@
/*
- Copyright 2010 Jeff Garzik
- Distributed under the MIT/X11 software license, see
- http://www.opensource.org/licenses/mit-license.php
+ * Copyright 2010 Jeff Garzik
+ *
+ * This program 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 2 of the License, or (at your option)
+ * any later version. See COPYING for more details.
*/
#define _GNU_SOURCE