2026-01-05 mdbx: update ChangeLog.
2026-01-05 mdbx-doc: add doxygen description of `mdbx_replace_ex()` (backport).
2026-01-05 mdbx-doc: clarify using `char8_t` as the `mdbx::byte` (backport).
2026-01-05 mdbx-docs: add BTC and SOL to donations (backport).
2026-01-05 mdbx-docs: refine common/title doxygen descriptions (backport).