This patch adds libmdbx v0.9.2:
- libmdbx is one of the fastest compact embeddable key-value ACID database.
- libmdbx has a specific set of properties and capabilities,
focused on creating unique lightweight solutions.
- libmdbx surpasses the legendary LMDB (Lightning Memory-Mapped Database)
in terms of reliability, features and performance.
- https://github.com/erthink/libmdbx
Signed-off-by: Leonid Yuriev <leo@yuriev.ru>
[yann.morin.1998@free.fr: split long lines]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
f36093a49e