What's new:
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- New API: sethostname.


What changed:
-------------


Bug Fixes
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- Enable non-SA_RESTART behaviour on threads other than main thread.
  Addresses: https://cygwin.com/ml/cygwin/2015-06/msg00260.html

- Try to handle concurrent close on socket more gracefully
  Addresses: https://cygwin.com/ml/cygwin/2015-06/msg00235.html