BTH5_SLIP_ESCAPE_XON
if (sc->sc_slip_txrsv == BTH5_SLIP_ESCAPE_XON ||
if (putc(BTH5_SLIP_ESCAPE_XON, &tp->t_outq) < 0) {
sc->sc_slip_txrsv = BTH5_SLIP_ESCAPE_XON;
DPRINTFN(4, ("0x%02x ", BTH5_SLIP_ESCAPE_XON));
c == BTH5_SLIP_ESCAPE_XON)