mdbx-chk: use mdbx_env_stat2() and mdbx_env_stat2() to avoid races.
mdbx-chk: use mdbx_env_stat2() and mdbx_env_stat2() to avoid races.

Change-Id: Ib956c19bec0b8bf9999cf1e97b8b630f119a0906

leo-yuriev/libfpta,leo-yuriev/libfpta