Copyright for leave source package in Xenial

The Debian "leave" package was put together by James Troup.
Current maintainer is Josip Rodin .

Original (NetBSD) sources can be obtained from:
	ftp://ftp.netbsd.org/pub/NetBSD-current/src/usr.bin/leave/
	http://cvsweb.netbsd.org/bsdweb.cgi/basesrc/usr.bin/leave/

Copyright (c) 1980, 1988, 1993
     The Regents of the University of California.  All rights reserved.

Licensed under the standard BSD license. On Debian systems, full text of
that can be found in the file /usr/share/common-licenses/BSD.