l2cap_disconnect
int l2cap_disconnect(struct l2cap_channel *, int);
l2cap_disconnect(so->so_pcb, 0);
l2cap_disconnect(pcb, 0);
error = l2cap_disconnect(pcb, so->so_linger);
l2cap_disconnect(rs->rs_l2cap, 0);
l2cap_disconnect(rs->rs_l2cap, 0);