KDC_ERR_PREAUTH_REQUIRED
if (error->error != KDC_ERR_PREAUTH_REQUIRED) {
} else if (rcode && rcode != KDC_ERR_PREAUTH_REQUIRED) {
(reply_code == KDC_ERR_PREAUTH_REQUIRED ||
} else if (reply_code == KDC_ERR_PREAUTH_REQUIRED && retry) {