More old versions to remove

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

Hi all,
to continue with the list of candidates for removal, I would like to
also nominate:

databases/py-psycopg
        Replaced by psycopg2
graphics/RenderKit and friends (3DKit, GLXKit, GeometryKit, SDLKit)
        Dead upstream, show fancy objc errors in some packages with
        newer GCC.
net/bind9
        Two versions of bind (9.5 and 9.6) should be good enough,
        so IMO 9.4 can go.
net/isc-dhclient
net/isc-dhcp
net/isc-dhcpd
net/isc-dhcrelay
        4.x should be good enough.
www/php4
        Well known security record. End of life was > 15 month ago.

Joerg