libc/winsup/cygwin/release/2.3.0

What's new:
-----------

- strftime(3) supports %s (seconds since Epoch) now.

- posix_madvise(POSIX_MADV_WILLNEED) now utilizes OS functionality available
  starting with Windows 8/Server 2012.  Still a no-op on older systems.

- posix_madvise(POSIX_MADV_DONTNEED) now utilizes OS functionality available
  starting with Windows 8.1/Server 2012R2.  Still a no-op on older systems.

- sysconf() now supports returning CPU cache information:
  _SC_LEVEL1_ICACHE_SIZE, _SC_LEVEL1_ICACHE_ASSOC, _SC_LEVEL1_ICACHE_LINESIZE,
  _SC_LEVEL1_DCACHE_SIZE, _SC_LEVEL1_DCACHE_ASSOC, _SC_LEVEL1_DCACHE_LINESIZE,
  _SC_LEVEL2_CACHE_SIZE, _SC_LEVEL2_CACHE_ASSOC, _SC_LEVEL2_CACHE_LINESIZE,
  _SC_LEVEL3_CACHE_SIZE, _SC_LEVEL3_CACHE_ASSOC, _SC_LEVEL3_CACHE_LINESIZE,
  _SC_LEVEL4_CACHE_SIZE, _SC_LEVEL4_CACHE_ASSOC, _SC_LEVEL4_CACHE_LINESIZE

- New API: aligned_alloc, at_quick_exit, quick_exit.


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

- Add support for Parallels Desktop FS (prlfs).


Bug Fixes
---------

- Fix a hang when stracing a forking or spawning process without activating
  stracing of child processes.
  Addresses: https://cygwin.com/ml/cygwin/2015-08/msg00390.html

- Fix long-standing potential SEGV on 32 bit Cygwin when the dynamic loader
  for OS functions fails to load a function on Windows 7 or later.
  Addresses: No actual bug report known.

- sysconf _SC_NPROCESSORS_CONF and _SC_NPROCESSORS_ONLN now handle more than
  64 CPUs on Windows 7 and later.

- Fix a potential crash in advisory file locking due to usage of stack space
  out of scope.
  Addresses: https://cygwin.com/ml/cygwin/2015-09/msg00079.html

- Fix EIO error accessing certain (OS X SMB?) drives
  Addresses: https://cygwin.com/ml/cygwin/2015-09/msg00229.html

- Fix memory leak in calls to pthread_getattr_np.

- Fix output of /proc/<PID>/winexename.

- Avoid SEGV when handling SIDs with 0 subauthorities.
  Addresses: https://cygwin.com/ml/cygwin/2015-10/msg00141.html

- Fix a potential SEGV on (at least) Wine.
  Addresses: https://cygwin.com/ml/cygwin/2015-10/msg00018.html

- Fix sigwait(3) to return errno instead of -1 and never to return with EINTR.

- Fix pthread_kill(3) to return errno instead of -1.

- Remove lingering pending signals after a thread exited.
  Addresses: https://cygwin.com/ml/cygwin/2015-09/msg00197.html

- Workaround a bug in Windows 10 NLS handling.
  Addresses: https://cygwin.com/ml/cygwin/2015-10/msg00547.html

- Avoid unnecessry locking and thus a potential deadlock in flock(2).
  Addresses: https://cygwin.com/ml/cygwin/2015-11/msg00095.html