v0.13.12 "Аврора" (Aurora).

The supporting release of a stable branch with bug fixes.

Since 2026 libmdbx project has changed its code development and distribution model.
Please see https://libmdbx.dqdkfa.ru/release/libmdbx-roadmap-HNY2026-english.pdf

 - Fixed the counting of nested trees in the `mdbx_chk` tool for a multi-values/dupsort hives (backport).
 - Fixed swapping the shrink/growth parameters in a DB-geometry in the `mdbx_load` utility (backport).
 - Fixed `SIGSEGV` in the case when all meta pages are not entirely usable (backport).
 - Fixed information collection via `kstat()` for bootid on Solaris and related platforms (backport).
 - Fixed a typo in the `ST_EXPORTED` processing path that broke the build on platforms where the mentioned flag is defined for `fstatvfs()` (backport).
 - Fixed missing error handling of `NtUnmapViewOfSection()` and `munmap()` inside `osal_munmap()` (backport).
 - Fixed `SIGSEGV` due to an attempt to clean/overwrite a corrupted meta page when opening the database in read-only mode (backport).
 - Fixed returning a wrong/uninitialized `ms_psize` field when using `mdbx_enumerate_tables()` (backport).
 - Fixed adjusting of neighbor nested cursors after a dupsort item deletion (backport).

For more information please see [ChangeLog](https://sourcecraft.dev/dqdkfa/libmdbx/browse/ChangeLog.md?rev=stable) in the `stable` branch.

git diff' stat: 20 files changed, 191 insertions(+), 215 deletions(-)
Signed-off-by: Леонид Юрьев (Leonid Yuriev) <leo@yuriev.ru>
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