rng.equal compares the RNG settings associated
with two objects.
rng1.equal tests whether two objects have
identical initial RNG settings.
rng.equal(x, y) rng1.equal(x, y)
rng.equal and rng.equal1 return a
TRUE or FALSE.
These functions return TRUE if the RNG settings
are identical, and FALSE otherwise. The comparison
is made between the hashes returned by RNGdigest.