newlib/winsup/cygwin/release/1.7.16

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What's new:
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- New API: memrchr.
Bug fixes:
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- 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:
http://cygwin.com/ml/cygwin/2012-05/msg00323.html
- Fix recv, recvfrom, recvmsg behaviour if a 0 bytes buffer is given
as argument. Fixes: http://cygwin.com/ml/cygwin/2012-05/msg00332.html
- Handle inode numbers returned by Samba >= 3.5.4.
Fixes: http://cygwin.com/ml/cygwin/2012-05/msg00236.html
- Fix emacs problem which exposed an issue with Cygwin's select() function.
If a signal arrives while select is blocking and the program longjmps
out of the signal handler then threads and memory may be left hanging.
Fixes: http://cygwin.com/ml/cygwin/2012-05/threads.html#00275