Fix some copyright notices:
- extend some to 2007
- use njn@valgrind.org instead of njn25@cam.ac.uk
- use "tool" instead of "skin"


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6703 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/callgrind/sim.c b/callgrind/sim.c
index 1c4c3b5..f15fc7d 100644
--- a/callgrind/sim.c
+++ b/callgrind/sim.c
@@ -5,12 +5,13 @@
 /*--------------------------------------------------------------------*/
 
 /*
-   This file is part of Callgrind.
-   (c) 2003-2005, Josef Weidendorfer
+   This file is part of Callgrind, a Valgrind tool for call graph
+   profiling programs.
 
-   Parts are Copyright (C) 2002 Nicholas Nethercote
-      njn25@cam.ac.uk
+   Copyright (C) 2003-2005, Josef Weidendorfer (Josef.Weidendorfer@gmx.de)
 
+   This tool is derived from and contains code from Cachegrind
+   Copyright (C) 2002-2007 Nicholas Nethercote (njn@valgrind.org)
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as