setoption
setoption(j, "T", false, true, &BlankEnvelope);
setoption(j, optarg, false, true, &BlankEnvelope);
setoption('f', "T", false, true, &BlankEnvelope);
setoption('c', "F", true, false, &BlankEnvelope);
setoption('d', "", true, false, &BlankEnvelope);
setoption(*optarg, optarg + 1, false, true,
setoption(' ', optarg, false, true, &BlankEnvelope);
setoption(bp[1], &bp[2], safe, false, e);
extern void setoption __P((int, char *, bool, bool, ENVELOPE *));