Updated: Cygwin 1.7.16

Hi Cygwin friends and users,

I just released Cygwin 1.7.16.  This is mainly a bugfix release.

Cygwin also comes with a new cygwin-debuginfo package for Cygwin DLL and
Cygwin utility debugging purposes.  The cygwin-debug package introduced
with 1.7.15 is consequentially deprecated, in favor of the new debuginfo
package.

What's new:
===========

- New API: getmntent_r, memrchr.

- Support ReFS.

Bug fixes:
==========

- Fix pipe creation problem which manifested as a problem creating a
  fifo.  Fixes: http://cygwin.com/ml/cygwin/2012-05/msg00253.html

- Fix hang when calling pthread_testcancel in a canceled thread.
  Fixes some of: http://cygwin.com/ml/cygwin/2012-05/msg00186.html

- Fix invocation of strace from a cygwin process.  Fixes:
  http://cygwin.com/ml/cygwin/2012-05/msg00292.html

- Fix hang when zero bytes are written to a pty using
  Windows WriteFile or equivalent.  Fixes: