nsec3_prove_closest_encloser
sec = nsec3_prove_closest_encloser(env, flt, ct, qinfo, 1, &ce, calc);
sec = nsec3_prove_closest_encloser(env, flt, ct, qinfo, 1, &ce, calc);
sec = nsec3_prove_closest_encloser(env, &flt, ct, qinfo, 1, &ce, &calc);
sec = nsec3_prove_closest_encloser(env, flt, ct, qinfo, 1, &ce, calc);
sec = nsec3_prove_closest_encloser(env, flt, ct, qinfo, 1, &ce, calc);
sec = nsec3_prove_closest_encloser(env, &flt, ct, qinfo, 1, &ce, &calc);