DV tag voice mod diversity

on *:nick: {
  if ($chan == #diversity) {
    if (([DV* iswm $newnick) && ($newnick !isvoice $chan)) {
      mode $chan +v $newnick
    }
    else if (($nick isvoice $chan) && (DV* !iswm $newnick)) {
      mode $chan -v $newnick
    }
  }
}