Update copyright notice.

nt/configure.bat

 @echo off
 rem   ----------------------------------------------------------------------
 rem   Configuration script for MS Windows 95/98 and NT/2000
-rem   Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+rem   Copyright (C) 1999-2001 Free Software Foundation, Inc.
 
 rem   This file is part of GNU Emacs.
 

nt/makefile.def

 #
 #  Makefile definition file for building GNU Emacs on Windows NT
+#  Copyright (c) 1994-2001 Free Software Foundation, Inc.
 #  
 #  GNU Emacs is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by

nt/makefile.nt

 #
 #  Top level makefile for building GNU Emacs on Windows NT
+#  Copyright (c) 1993-2000 Free Software Foundation, Inc.
 #
 #  This file is part of GNU Emacs.
 #  

src/makefile.w32-in

 #  Makefile for GNU Emacs on the Microsoft W32 API.
-#  Copyright (c) 1992-2000 Free Software Foundation, Inc.
+#  Copyright (c) 2000-2001 Free Software Foundation, Inc.
 #
 #  This file is part of GNU Emacs.
 #