What's new:
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What changed:
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- Slightly improve randomness of /dev/random emulation.

Bug fixes:
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- pthread_atparent hook should not be called in the child.
  Fixes: http://cygwin.com/ml/cygwin/2013-09/msg00365.html

- 64 bit only:  Correctly mmap'ing regions > 4 Gigs.
  Fixes: http://cygwin.com/ml/cygwin/2013-09/msg00155.html