Update d/copyright

debian/copyright

@@ -83,10 +83,6 @@ Copyright: 1993, Michael Haardt <michael@moria.de>
            1993, Scorpio, www.linuxforum.net
 License: GPL-2+
 
-Files: contrib/udbachk.tgz
-Copyright: 1999, Sami Kerola and Janne Riihijärvi
-License: GPL-2+
-
 Files: man/hu/man5/*
 Copyright: 1993, Michael Haardt <u31b3hs@pool.informatik.rwth-aachen.de>
 License: GPL-2+
@@ -95,18 +91,10 @@ Files: contrib/adduser2.sh
 Copyright: 1996, Petri Mattila, Prihateam Networks <petri@prihateam.fi>
 License: GPL-2+
 
-Files: contrib/pwdauth.c
-Copyright: 1996, Marek Michalkiewicz
-License: BSD-3-clause
-
 Files: lib/subordinateio.h
 Copyright: 2012, Eric W. Biederman
 License: BSD-3-clause
 
-Files: libmisc/date_to_str.c
-Copyright: 2021, Alejandro Colomar <alx.manpages@gmail.com>
-License: BSD-3-clause
-
 Files: man/hu/man1/su.1
 Copyright: 1999, Ragnar Hojland Espinosa <ragnar@macula.net>
 License: BSD-3-clause
@@ -137,16 +125,6 @@ Copyright: 1997, Guy Maor <maor@ece.utexas.edu>
            2007 - 2013, Nicolas François
 License: GPL-2+
 
-Files: libmisc/getdate.y
-Copyright: Steven M. Bellovin <smb@research.att.com>
-License: public-domain
- Originally written by Steven M. Bellovin <smb@research.att.com> while
- at the University of North Carolina at Chapel Hill.  Later tweaked by
- a couple of people on Usenet.  Completely overhauled by Rich $alz
- <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
- .
- This code is in the public domain and has no copyright.
-
 Files: man/ko/man5/*
 Copyright: 2000, ASPLINUX <man@asp-linux.co.kr>
 License: GPL-2+
@@ -165,7 +143,7 @@ Copyright: 1991-1993, Chip Rosenthal
            2007-2009, Nicolas François
 License: BSD-3-clause
 
-Files: debian/patches/401_cppw_src.dpatch
+Files: debian/patches/401_cppw_src.patch
 Copyright: 1997, Guy Maor <maor@ece.utexas.edu>
            1999, Stephen Frost <sfrost@snowman.net>
 License: GPL-2+