casncmp
if (casncmp(op, "delivery", 7) == 0) {
} else if (casncmp(op, "nodelivery", 10) == 0) {
} else if (casncmp(op, "report", 6) == 0) {
} else if (casncmp(op, "return", 6) == 0) {
} else if (casncmp(op, "ignore", 6) == 0) {
(casncmp("mail", hptr->value, 4) != 0)) {
if (casncmp(s, p, strlen(p)) == 0) {
if (casncmp(del_empty, "yes", (ssize_t)del_len))
else if (!casncmp(del_empty, "no", (ssize_t)del_len)) {
extern int casncmp(char *s1, char *s2, ssize_t n);
extern int casncmp();