- Update to Botan 2.10
  * Bump SONAME
  * Warning: XMSS currently implements draft-06 which is not compatible with
    the final RFC 8391 specification. A PR is open to fix this, however it will
    break all current uses of XMSS. If you are currently using XMSS please
    comment at https://github.com/randombit/botan/pull/1858. Otherwise the PR
    will be merged and support for draft-06 will be removed starting in 2.11.
  * Added a new certificate store implementation that can access the MacOS
    keychain certificate store. (GH #1830)
  * Redesigned Memory_Pool class, which services allocations out of a set of
    pages locked into memory (using mlock/VirtualLock). It is now faster and
    with improved exploit mitigations. (GH #1800)
  * Add BMI2 implementations of SHA-512 and SHA-3 which improve performance by
    25-35% on common CPUs. (GH #1815)
  * Unroll SHA-3 computation improving performance by 10-12% (GH #1838)
  * Add a Thread_Pool class. It is now possible to run the tests in multiple
    threads with --test-threads=N flag to select the number of threads to use.
    Use --test-threads=0 to run with as many CPU cores as are available on the
    current system. The default remains single threaded. (GH #1819)
  * XMSS signatures now uses a global thread pool instead of spawning new
    threads for each usage. This improves signature generation performance by
    between 10% and 60% depending on architecture and core count. (GH #1864)
  * Some functions related to encoding and decoding BigInts have been
    deprecated. (GH #1817)
  * Binary encoding and decoding of BigInts has been optimized by performing
    word-size operations when possible. (GH #1817)
  * Rename the exception Integrity_Failure to Invalid_Authentication_Tag to
    make its meaning and usage more clear. The old name remains as a typedef.
    (GH #1816)
  * Support for using Boost filesystem and MSVC’s std::filesystem have been

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