newlib/winsup/cygwin/release/2.3.0

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What's new:
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- 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:
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- Add support for Parallels Desktop FS (prlfs).
Bug Fixes
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- 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