What's new:
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What changed:
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- Added CYGWIN environment variable keyword which causes the full windows command
  line (<=32K) to always be sent to subprocesses.
  See: http://cygwin.com/ml/cygwin/2013-07/threads.html#00523

Bug fixes:
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- Fix race condition in POSIX semaphores which potentially breaks fork() when
  using POSIX semaphores in a multithreaded process.
  Fixes: http://cygwin.com/ml/cygwin/2013-07/msg00404.html
         http://cygwin.com/ml/cygwin/2013-07/msg00198.html