Remove the advertising clause where possible as per the directive from

Remove the advertising clause where possible as per the directive from
UC Berkeley (see /usr/src/COPYRIGHT) and with Ken Smith's permission
for mv.c.

>From:     Ken Smith <kensmith@cse.Buffalo.EDU>
>Subject:  mv.c license change
>To:       Matthew Dillon <dillon@apollo.backplane.com>
>Date:     Thu, 19 Aug 2004 13:30:28 -0400
>
>Yes, you have my permission to remove the advertising clause from
>the license agreement in /usr/src/bin/mv/mv.c.
>
>--
>                                                Ken Smith
>- From there to here, from here to      |       kensmith@cse.buffalo.edu
>  there, funny things are everywhere.   |
>                      - Theodore Geisel |