Add license note

This commit was SVN r10302.

LICENSE

@@ -9,6 +9,7 @@ Copyright (c) 2004-2006 High Performance Computing Center Stuttgart,
 Copyright (c) 2004-2006 The Regents of the University of California.
                         All rights reserved.
 Copyright (c) 2006      Cisco Systems, Inc.  All rights reserved.
+Copyright (c) 2006      Voltaire, Inc. All rights reserved.
 $COPYRIGHT$
 
 Additional copyrights may follow