- updated to 4.20c
  + A new forkserver communication model is now introduced. afl-fuzz is
    backward compatible to old compiled targets if they are not built
    for CMPLOG/Redqueen, but new compiled targets will not work with
    old afl-fuzz versions!
  + Recompile all targets that are instrumented for CMPLOG/Redqueen!
  - AFL++ now supports up to 4 billion coverage edges, up from 6 million.
  - New compile option: `make PERFORMANCE=1` - this will enable special
    CPU dependent optimizations that make everything more performant - but
    the binaries will likely won't work on different platforms. Also
    enables a faster hasher if the CPU requirements are met.
  - The persistent record feature (see config.h) was expanded to also
    support replay, thanks to @quarta-qti !
  - afl-fuzz:
    - the new deterministic fuzzing feature is now activated by default,
      deactivate with -z. Parameters -d and -D are ignored.
    - small improvements to CMPLOG/redqueen
    - workround for a bug with MOpt -L when used with -M - in the future
      we will either remove or rewrite MOpt.
    - fix for `-t xxx+` feature
    - -e extension option now saves the queue items, crashes, etc. with the
      extension too
    - fixes for trimmming, correct -V time and reading stats on resume by eqv
      thanks a lot!
  - afl-cc:
    - added collision free caller instrumentation to LTO mode. activate with
      `AFL_LLVM_LTO_CALLER=1`. You can set a max depth to go through single
      block functions with `AFL_LLVM_LTO_CALLER_DEPTH` (default 0)
    - fixes for COMPCOV/LAF and most other modules
    - fix for GCC_PLUGIN cmplog that broke on std::strings (forwarded request 1167801 from msmeissn)

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