F_NOHUP
#define F_SAVE (F_NICE|F_TIME|F_NOHUP) /* save these when re-doing */
if (t->t_dflg & F_NOHUP)
t->t_dflg |= F_NOHUP;
(F_PIPEOUT | F_AMPERSAND | F_NICE | F_NOHUP)))) ||