libmdbx: switch to original amalgamated source code (v0.9.1.18)

Amalgamated source code is the recommended form for
embedding libmdbx in non-CMake build systems. This amalgamated
version contains a minimum of files, is fully ready for use,
and make impossible a number of errors.

To upgrade or switch to a different version, just unpack
to the `src` subdirectory a corresponding `libmdbx-amalgamated-X_Y_Z.zip`
at the https://github.com/erthink/libmdbx/releases.

For instance, the https://github.com/erthink/libmdbx/releases/download/v0.9.2/libmdbx-amalgamated-0_9_2.zip
for the next release.

--

Minimal changes have been made to the build configuration:

1. For use the standard `DllMain()` entry of libmdbx:
   - added the `MDBX_BUILD_SHARED_LIBRARY=1` option;
   - removed the `MDBX_CONFIG_MANUAL_TLS_CALLBACK` option;
   - deleted the `miranda.c` file containing only `DllMain()`
     with the `mdbx_dll_handle()` call, now this is done by the library itself.

2. Removed refs to extra files (that missing in the amalgamated source code):
   - for building `libmdbx.dll` only the `mdbx.h` and `mdbx.c` are used,
     but not `mdbx.c++` for a C++ API;
   - for building the `mdbx_chk`, `mdbx_load`, and `mdbx_dump` utilities
     only it own sources are used.

--

Last libmdbx changes:

 - Fixed missing installation of `mdbx.h++`.
 - Fixed use of obsolete `__noreturn`.
 - Fixed use of `yield` instruction on ARM if unsupported.
 - Added pthread workaround for buggy toolchain/cmake/buildroot.
 - Fixed use of `pthread_yield()` for non-GLIBC.
 - Fixed use of `RegGetValueA()` on Windows 2000/XP.
 - Fixed use of `GetTickCount64()` on Windows 2000/XP.
 - Fixed opening DB on a network shares (in the exclusive mode).
 - Fixed copy&paste typos.
 - Fixed minor false-positive GCC warning.

1 files changed, 0 insertions, 54 deletions

diff --git a/libs/libmdbx/src/.github/workflows/release-assets.yml b/libs/libmdbx/src/.github/workflows/release-assets.yml
deleted file mode 100644
index 934ab93b39..0000000000
--- a/libs/libmdbx/src/.github/workflows/release-assets.yml
+++ /dev/null
@@ -1,54 +0,0 @@
-# Based on the https://github.com/actions/upload-release-asset example
-
-on:
-  push:
-    # Sequence of patterns matched against refs/tags
-    tags:
-    - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
-
-name: Upload Release Asset
-
-jobs:
-  build:
-    name: Upload Release Asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-      - name: Build assets
-        run: |
-          make release-assets
-      - id: name
-        run: |
-          echo "::set-output name=tarball::$(ls *.tar.gz)"
-          echo "::set-output name=zip::$(ls *.zip)"
-      - name: Create Release
-        id: create_release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: Release ${{ github.ref }}
-          draft: true
-          prerelease: true
-      - name: Upload tarball
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: ${{ steps.name.outputs.tarball }}
-          asset_name: amalgamated.tar.gz
-          # asset_label: Amalgamated source tarball
-          asset_content_type: application/tar+gzip
-      - name: Upload zip
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: ${{ steps.name.outputs.zip }}
-          asset_name: amalgamated.zip
-          # asset_label: Amalgamated source zip-archive
-          asset_content_type: application/zip