Update copyright notice.

Conflicts:
	radsecproxy.c

radsecproxy.c

 /*
  * Copyright (C) 2006-2009 Stig Venaas <venaas@uninett.no>
- * Copyright (C) 2010,2011,2012 NORDUnet A/S
+ * Copyright (C) 2010-2013,2015 NORDUnet A/S
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above