rumpuser_wg_send_peer
error = rumpuser_wg_send_peer(wg->wg_user, wgsatosa(wgsa),
error = rumpuser_wg_send_peer(wg->wg_user, &dst.sa, pkt, pktlen);
int rumpuser_wg_send_peer(struct wg_user *, const struct sockaddr *,