slirp: is not maintained by Kelly Price for a long time

slirp has been maintained by the QEMU maintainers and will be
maintained under an independent project soon.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kelly Price <strredwolf@gmail.com>
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

slirp/COPYRIGHT

 Slirp was written by Danny Gasparovski.
 Copyright (c), 1995,1996 All Rights Reserved.
 
-Slirp is maintained by Kelly Price <tygris+slirp@erols.com>
-
 Slirp is free software; "free" as in you don't have to pay for it, and you
 are free to do whatever you want with it.  I do not accept any donations,
 monetary or otherwise, for Slirp.  Instead, I would ask you to pass this