0MQ version 4.2.2 stable, released on 2017/02/18

• Improve compatibility with GNU Hurd
• Fixed #2286 - improve CMake on Windows documentation
• Fixed #1235 - improved compatibility with mingw64
• Improve zmq_proxy documentation to state it can return ETERM as well
• Fixed #1442 - SO_NOSIGPIPE and connection closing by peer race condition
• Improve CMake functionality on Windows: ZeroMQConfig.cmake generation CPack
  option, correct static library filename, ship FindSodium.cmake in tarball
• Fixed #2228 - setting HWM after connect on inproc transport leads to infinite
  HWM
• Add support for Visual Studio 2017
• New DRAFT (see NEWS for 4.2.0) zmq_has option "draft" option that returns
  true if the library was built with DRAFT enabled. Useful for FFI bindings.
  See doc/zmq_has.txt for more information
• Fixed #2321 - zmq_z85_decode does not validate its input. The function has
  been fixed to correctly follow RFC32 and return NULL if the input is invalid
• Fixed #2323 - clock_t related crash on Apple iOS 9.3.2 and 9.3.5
• Fixed #1801 - OSX: Cmake installs libzmq in a weird PATH
• Fixed potential divide by zero in zmq::lb_t::sendpipe
• Improve compatibility with OpenIndiana by skipping epoll and using poll/select
• Fix IPv4-in-IPv6 mapped addresses parsing error