adding license header

git-svn-id: https://conky.svn.sourceforge.net/svnroot/conky/trunk/conky1@998 7f574dfc-610e-0410-a909-a81674777703

src/diskio.h

@@ -1,3 +1,32 @@
+/*
+ * Conky, a system monitor, based on torsmo
+ *
+ * Any original torsmo code is licensed under the BSD license
+ *
+ * All code written since the fork of torsmo is licensed under the GPL
+ *
+ * Please see COPYING for details
+ *
+ * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
+ * Copyright (c) 2005-2007 Brenden Matthews, Philip Kovacs, et. al.
+ * (see AUTHORS)
+ * All rights reserved.
+ *
+ * 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 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 General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *  $Id$
+ */
+
 #ifndef DISKIO_H_
 #define DISKIO_H_