keep disclaiming narrower than 32-bit support.

have impact on performance, because amount of multiplications does not
increase with this switch, not on sparcv9 that is. On the contrary, it
actually improves performance, because it spares a load of instructions
used to chase carries. Not to mention that BN assembler modules can be
shared more freely between 32- and 64-bit builts.

space, but gives total flexibility [back].

made...

called whrlpool is not a typo, but a way to keep the names shorter than
8 characters. Remaining TODO list comprises adding OID, EVP, corresponding
flag to apps/openssl dgst, benchmark, engage assembler...

bn_sub_words to the rest of the sparcv8plus.S.

baffled why it crashes and does it sporadically...