vanhauser-thc / AFLplusplus

Note: we jump to 2.57 instead of 2.55 to catch up with Google's versioning

Changelog:

• persistent mode for QEMU (see qemu_mode/README.md)
• custom mutator library is now an additional mutator, to exclusivly use it
  add AFL_CUSTOM_MUTATOR_ONLY (that will trigger the previous behaviour)
• new library qemu_mode/unsigaction which filters sigaction events
• afl-fuzz: new command line option -I to execute a command on a new crash
• no more unlinking the input file, this way the input file can also be a
  FIFO or disk partition
• setting LLVM_CONFIG for llvm_mode will now again switch to the selected
  llvm version. If your setup is correct.
• fuzzing strategy yields for custom mutator were missing from the UI, added them :)
• added "make tests" which will perform checks to see that all functionality
  is working as expected. this is currently the starting point, its not complete :)
• added mutation documentation feature ("make document"), creates afl-fuzz-document
  and saves all mutations of the first run on the first file into out/queue/mutations
• libtokencap and libdislocator now compile to the afl_root directory and are
  installed to the .../lib/afl directory when present during make install
• more BSD support, e.g. free CPU binding code for FreeBSD (thanks to devnexen)
• reducing duplicate code in afl-fuzz
• added "make help"
• removed compile warnings from python internal stuff
• added man page for afl-clang-fast[++]
• updated documentation
• Wine mode to run Win32 binaries with the QEMU instrumentation (-W)
• CompareCoverage for ARM target in QEMU/Unicorn