Add the following to /etc/xinetd.conf:

service swat
{
	socket_type             = stream
	port                    = 901
	protocol                = tcp
	wait                    = no
	user                    = root
	server                  = D_sbindir/swat
}

And the following to /etc/services:

swat    901/tcp # SWAT (Samba Administration Tool)