TF_NODELAY
(idle || (tp->t_flags & TF_NODELAY)) &&
tp->t_flags = sototcpcb(lso)->t_flags & (TF_NOPUSH | TF_NODELAY);
opt = TF_NODELAY;
optval = tp->t_flags & TF_NODELAY;
((elm->xtcp.xt_tp.t_flags & TF_NODELAY) ?