bridge_copytag
bridge_copytag(brtag, &p->brt_tunnel);
bridge_copytag(brtag, &q->brt_tunnel);
bridge_copytag(brtag, &p->brt_tunnel);
bridge_copytag(brtag, &p->brt_tunnel);
bridge_copytag(&p->brt_tunnel, brtag);
void bridge_copytag(struct bridge_tunneltag *, struct bridge_tunneltag *);