Also update copyright years.
Copyright and Other Notices
---------------------------
-Copyright (C) 1985-2012 by the Massachusetts Institute of Technology
+Copyright (C) 1985-2013 by the Massachusetts Institute of Technology
and its contributors. All rights reserved.
Please see the file named NOTICE for additional notices.
Philip Guenther
Dominic Hargreaves
Jakob Haufe
+ Matthieu Hautreux
Paul B. Henson
Jeff Hodges
Christopher Hogan
Michael Spang
Michael Ströder
Bjørn Tore Sund
+ Joe Travaglini
Rathor Vipin
Jorgen Wahlsten
Stef Walter
Max (Weijun) Wang
John Washington
Stef Walter
+ Xi Wang
Kevin Wasserman
Margaret Wasserman
Marcus Watts
Xu Qiang
Nickolai Zeldovich
Hanz van Zijst
+ Gertjan Zwartjes
The above is not an exhaustive list; many others have contributed in
various ways to the MIT Kerberos development effort over the years.