Consider to support bindings for MDBX

Hello.

MDXB is a fork of LMDB which provides some very good additional goodies.
Read https://github.com/erthink/libmdbx for more details.

It would be great if LMDB Java could be expanded to support that fork as well.
Alternatively, an MDBX Java library could potentially be initiated to support it in parallel.

There is indeed a binding library already available, but it's not as maintained as this one. :)