strtolower
strtolower(ep->d_name, name, sizeof(name));
strtolower(&name[len], icname, sizeof(icname));
strtolower(&name[len], icname, sizeof(icname));
const char *strtolower(const char *);
strtolower(dl->dl_name));
n = strtolower(name);
if (undo_option(selecttab, NULL, NULL, strtolower(name), "options", nowarn))
n = strtolower(name);
n = strtolower(name);
undo_option(stab, NULL, NULL, strtolower(name), type, 0))
n = strtolower(nv->nv_name);
return (ht_lookup(selecttab, strtolower(name)) != NULL);