CDISCARD
{ "discard", VDISCARD, CDISCARD },
{ "flush", VDISCARD, CDISCARD },
CQUIT, CSUSP, CDSUSP, CSTART, CSTOP, CLNEXT, CDISCARD, CMIN, CTIME,
#define CFLUSH CDISCARD
#if defined(VDISCARD) && defined(CDISCARD)
mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD);