4 - New API: timingsafe_bcmp, timingsafe_memcmp
14 - cygcheck and strace now always generate output with Unix LF line endings,
15 rather than with DOS/Windows CR LF line endings.
17 - fork now preserves the load order of unrelated dlopen'd modules.
19 - pthread_cond_wait now acts like Linux and BSD: Resume waiting for the
20 condition variable as if it was not interrupted, rather than returning 0.
22 - The internal <sys/_locale.h> header was renamed to <xlocale.h> for
23 source compatibility with other systems.
25 - Try harder supporting Netapp drives.
31 - Fix a few problems which are the combined culprit of fork failing
32 when called recursively from a pthread.
33 Addresses: https://cygwin.com/ml/cygwin/2017-03/msg00113.html
35 - Fix potential buffer overflow in getrandom.
37 - Fix write(2) return value for writes > 2 GB.
39 - Workaround Windows NUL having the same problem for writes > 4 GB.
40 Addresses: https://cygwin.com/ml/cygwin/2017-03/msg00144.html
42 - Fix a potential crash in duplocale.
43 Addresses: https://sourceware.org/ml/newlib/2017/msg00166.html
45 - Fix dlopen/dlclose reference counting to make sure FreeLibrary isn't
46 called too early in forked process.
47 Addresses: https://cygwin.com/ml/cygwin/2017-03/msg00220.html
49 - Fix concurrency problems in cygserver.
50 Addresses: https://cygwin.com/ml/cygwin/2017-03/msg00218.html