C_DISCARD
{"discard", C_SH(C_DISCARD), MD_CHAR},
case C_DISCARD:
s[C_DISCARD] = td->c_cc[VDISCARD];
C_SH(C_SUSP) | C_SH(C_DSUSP) | C_SH(C_EOL) | C_SH(C_DISCARD) |
td->c_cc[VDISCARD] = s[C_DISCARD];