MPPE_OPT_56BIT
if (val & MPPE_OPT_56BIT) {
val |= MPPE_OPT_56BIT;
val |= MPPE_OPT_128BIT | MPPE_OPT_56BIT | MPPE_OPT_40BIT;
case MPPE_OPT_56BIT:
else if (peer & MPPE_OPT_56BIT)
mval |= MPPE_OPT_56BIT;
case MPPE_OPT_56BIT: