- update to 5.6.0:
  * This bumps the minor version of liblzma because new
    features were added. The API and ABI are still backward
    compatible with liblzma 5.4.x and 5.2.x and 5.0.x.
  * liblzma:
    - Disabled the branchless C variant in the LZMA
    decoder based on the benchmark results from the community.
    - Disabled x86-64 inline assembly on x32 to fix the
    build.
  * Sandboxing support in xz:
    - Landlock is now used even when xz needs to create
    files.
    - Landlock and pledge(2) are now stricter when
    reading from more than one input file and only writing to
    standard output.
    - Added support for Landlock ABI version 4.
    - Now builds lzmainfo and lzmadec.
    - xzdiff, xzgrep, xzless, xzmore, and their symlinks
    are now installed. The scripts are also tested during "make
    test".
    - Added translation support for xz, lzmainfo, and the
      man pages.
    - Minimum required CMake version is now 3.14.
  * liblzma:
    - LZMA decoder: Speed optimizations to the C code and
    added GCC & Clang compatible inline assembly for
    x86-64.
    - Added lzma_mt_block_size() to recommend a Block
    size for multithreaded encoding.
    - Added CLMUL-based CRC32 on x86-64 and E2K with

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