KRB5_TL_EXTENSION
add_tl(princ, KRB5_TL_EXTENSION, &buf);
add_tl(princ, KRB5_TL_EXTENSION, &buf);
add_tl(princ, KRB5_TL_EXTENSION, &buf);
tl->tl_data_type = KRB5_TL_EXTENSION;
} else if (tl_data->tl_data_type == KRB5_TL_EXTENSION) {