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Bug Fixes ---------

- Revert the following patch from 2.2.0:
  When  started  from a non-Cygwin process, check if $HOME starts
with a
  slash (absolute POSIX path).  Otherwise ignore it.
  Addresses discussion starting at
  https://cygwin.com/ml/cygwin/2015-08/msg00048.html

- Fix output of /proc/cpuinfo in terms of cpu topology and  cache
size for
  modern  CPUs  and  modern  Windows OSes supporting more than 64
logical CPUs.
  Addresses: https://cygwin.com/ml/cygwin/2015-06/msg00345.html

- Don't call LsaLookupSids to fetch group information  and  don't
perform RFC2307
  owner/group  mapping  on  Samba/NFS  if  account  info  is only
fetched from local
  passwd/group files.
  Addresses: https://cygwin.com/ml/cygwin/2015-07/msg00270.html

- Precautionally fix a potential data corruption problem in  pipe
I/O, only
  actually  observered in Wine yet.  However, MSDN language indi-
cates this
  might be a problem on real Windows as well.
  Addresses: https://cygwin.com/ml/cygwin/2015-08/msg00225.html

- Include <sys/ucontext.h> from <sys/signal.h> if  compiling  for
POSIX.1-2008.
  Addresses: https://cygwin.com/ml/cygwin/2015-08/msg00266.html

-  getservent(3)  returned  the  port  number in host byte order.
Change that to
  network byte order as required.
  Addresses: https://cygwin.com/ml/cygwin/2015-08/msg00301.html