Update PyDoc topics and NEWS blurbs for 3.7.0a1

Misc/NEWS.d/next/Build/0019.bpo-28676.Wxf6Ds.rst

-Prevent missing 'getentropy' declaration warning on macOS. Patch by Gareth
-Rees.

Misc/NEWS.d/next/Build/0020.bpo-15819.QVDr3E.rst

-Remove redundant include search directory option for building outside the
-source tree.

Misc/NEWS.d/next/Build/0021.bpo-27979.fR0KgM.rst

-A full copy of libffi is no longer bundled for use when building _ctypes on
-non-OSX UNIX platforms.  An installed copy of libffi is now required when
-building _ctypes on such platforms.

Misc/NEWS.d/next/Build/0022.bpo-26661.Z_HNbs.rst

-setup.py now detects system libffi with multiarch wrapper.

Misc/NEWS.d/next/Build/0023.bpo-28258.iKtAHd.rst

-Fixed build with Estonian locale (python-config and distclean targets in
-Makefile).  Patch by Arfrever Frehtes Taifersar Arahesis.

Misc/NEWS.d/next/Build/0024.bpo-21085.2VvyUF.rst

-Add configure check for siginfo_t.si_band, which Cygwin does not provide.
-Patch by Masayuki Yamamoto with review and rebase by Erik Bray.

Misc/NEWS.d/next/Build/0025.bpo-13756.sslhpC.rst

-Fix building extensions modules on Cygwin.  Patch by Roumen Petrov, based on
-original patch by Jason Tishler.

Misc/NEWS.d/next/Build/0026.bpo-21124.1bbArU.rst

-Fix building the _struct module on Cygwin by passing ``NULL`` instead of
-``&PyType_Type`` to PyVarObject_HEAD_INIT.  Patch by Masayuki Yamamoto.

Misc/NEWS.d/next/Build/0027.bpo-28248.KY_-en.rst

-Update Windows build and OS X installers to use OpenSSL 1.0.2j.

Misc/NEWS.d/next/Build/0028.bpo-28208.DtoP1i.rst

-Update Windows build and OS X installers to use SQLite 3.14.2.

Misc/NEWS.d/next/Build/0029.bpo-28444.zkc9nT.rst

-Fix missing extensions modules when cross compiling.

Misc/NEWS.d/next/Build/0030.bpo-26359.CLz6qy.rst

-Rename --with-optimiations to --enable-optimizations.

Misc/NEWS.d/next/Build/0031.bpo-10656.pR8FFU.rst

-Fix out-of-tree building on AIX.  Patch by Tristan Carel and Michael
-Haubenwallner.

Misc/NEWS.d/next/Build/0032.bpo-28849.AzRRF5.rst

-Do not define sys.implementation._multiarch on Android.

Misc/NEWS.d/next/Build/0033.bpo-20211.gpNptI.rst

-Do not add the directory for installing C header files and the directory for
-installing object code libraries to the cross compilation search paths.
-Original patch by Thomas Petazzoni.

Misc/NEWS.d/next/Build/0034.bpo-28538.FqtN7v.rst

-Fix the compilation error that occurs because if_nameindex() is available on
-Android API level 24, but the if_nameindex structure is not defined.

Misc/NEWS.d/next/Build/0035.bpo-28762.Ru0YN_.rst

-lockf() is available on Android API level 24, but the F_LOCK macro is not
-defined in android-ndk-r13.

Misc/NEWS.d/next/Build/0036.bpo-23903.JXJ889.rst

-Added missed names to PC/python3.def.

Misc/NEWS.d/next/Build/0037.bpo-29080.b3qLQT.rst

-Removes hard dependency on hg.exe from PCBuild/build.bat

Misc/NEWS.d/next/Build/0038.bpo-28768.b9_a6E.rst

-Fix implicit declaration of function _setmode. Patch by Masayuki Yamamoto

Misc/NEWS.d/next/Build/0039.bpo-26851.R5243g.rst

-Set Android compilation and link flags.

Misc/NEWS.d/next/Build/0040.bpo-29384.v3IqBE.rst

-Remove old Be OS helper scripts.

Misc/NEWS.d/next/Build/0041.bpo-27659.i8UzRC.rst

-Prohibit implicit C function declarations: use -Werror=implicit-function-
-declaration when possible (GCC and Clang, but it depends on the compiler
-version). Patch written by Chi Hsuan Yen.

Misc/NEWS.d/next/Build/0042.bpo-29572.iZ1XKK.rst

-Update Windows build and OS X installers to use OpenSSL 1.0.2k.

Misc/NEWS.d/next/Build/0043.bpo-27593.v87xEr.rst

-sys.version and the platform module python_build(), python_branch(), and
-python_revision() functions now use git information rather than hg when
-building from a repo.

Misc/NEWS.d/next/Build/0044.bpo-29643.4WLIJQ.rst

-Fix ``--enable-optimization`` didn't work.

Misc/NEWS.d/next/Build/0045.bpo-23404.PdYVWg.rst

-Don't regenerate generated files based on file modification time anymore:
-the action is now explicit. Replace ``make touch`` with ``make regen-all``.

Misc/NEWS.d/next/Build/0046.bpo-29243.WDK4hT.rst

-Prevent unnecessary rebuilding of Python during ``make test``, ``make
-install`` and some other make targets when configured with ``--enable-
-optimizations``.

Misc/NEWS.d/next/Build/0047.bpo-28787.vhH_6a.rst

-Fix out-of-tree builds of Python when configured with ``--with--dtrace``.

Misc/NEWS.d/next/Build/0048.bpo-29941.ylh45A.rst

-Add ``--with-assertions`` configure flag to explicitly enable C ``assert()``
-checks. Defaults to off. ``--with-pydebug`` implies ``--with-assertions``.

Misc/NEWS.d/next/Build/0049.bpo-20210.MN_n-r.rst

-Support the *disabled* marker in Setup files. Extension modules listed after
-this marker are not built at all, neither by the Makefile nor by setup.py.

Misc/NEWS.d/next/Build/0050.bpo-30687.8mqHnu.rst

-Locate msbuild.exe on Windows when building rather than vcvarsall.bat

Misc/NEWS.d/next/Build/2017-07-05-16-54-59.bpo-30854.sPADRI.rst

-Fix compile error when compiling --without-threads.
-Patch by Masayuki Yamamoto.

Misc/NEWS.d/next/Build/2017-09-04-14-43-46.bpo-31341.XLuZFk.rst

-Per PEP 11, support for the IRIX operating system was removed.

Misc/NEWS.d/next/Build/2017-09-06-23-14-08.bpo-31370.-j4kN4.rst

-Remove support for building --without-threads.
-
-This option is not really useful anymore in the 21st century. Removing lots
-of conditional paths allows us to simplify the code base, including in
-difficult to maintain low-level internal code.

Misc/NEWS.d/next/Build/2017-09-08-11-48-11.bpo-31354.4f-VJK.rst

-Allow --with-lto to be used on all builds, not just `make profile-opt`.

Misc/NEWS.d/next/C API/0061.bpo-28426.zPwvbI.rst

-Deprecated undocumented functions PyUnicode_AsEncodedObject(),
-PyUnicode_AsDecodedObject(), PyUnicode_AsDecodedUnicode() and
-PyUnicode_AsEncodedUnicode().

Misc/NEWS.d/next/C API/0062.bpo-19569.IPke0J.rst

-Compiler warnings are now emitted if use most of deprecated functions.

Misc/NEWS.d/next/C API/0063.bpo-28748.AMgb_G.rst

-Private variable _Py_PackageContext is now of type ``const char *`` rather
-of ``char *``.

Misc/NEWS.d/next/C API/0064.bpo-28761.iOgCoX.rst

-The fields name and doc of structures PyMemberDef, PyGetSetDef,
-PyStructSequence_Field, PyStructSequence_Desc, and wrapperbase are now of
-type ``const char *`` rather of ``char *``.

Misc/NEWS.d/next/C API/0065.bpo-28808.A03X6r.rst

-PyUnicode_CompareWithASCIIString() now never raises exceptions.

Misc/NEWS.d/next/C API/0066.bpo-28822.gMqwvb.rst

-The index parameters *start* and *end* of PyUnicode_FindChar() are now
-adjusted to behave like ``str[start:end]``.

Misc/NEWS.d/next/C API/0067.bpo-29058.0wNVP8.rst

-All stable API extensions added after Python 3.2 are now available only when
-Py_LIMITED_API is set to the PY_VERSION_HEX value of the minimum Python
-version supporting this API.

Misc/NEWS.d/next/C API/0068.bpo-28769.Ecmtn8.rst

-The result of PyUnicode_AsUTF8AndSize() and PyUnicode_AsUTF8() is now of
-type ``const char *`` rather of ``char *``.

Misc/NEWS.d/next/C API/0069.bpo-29083.tGTjr_.rst

-Fixed the declaration of some public API functions. PyArg_VaParse() and
-PyArg_VaParseTupleAndKeywords() were not available in limited API.
-PyArg_ValidateKeywordArguments(), PyArg_UnpackTuple() and Py_BuildValue()
-were not available in limited API of version < 3.3 when PY_SSIZE_T_CLEAN is
-defined.

Misc/NEWS.d/next/C API/0070.bpo-27867.J-8CGo.rst

-Function PySlice_GetIndicesEx() is deprecated and replaced with a macro if
-Py_LIMITED_API is not set or set to the value between 0x03050400 and
-0x03060000 (not including) or 0x03060100 or higher.  Added functions
-PySlice_Unpack() and PySlice_AdjustIndices().

Misc/NEWS.d/next/C API/0071.bpo-6532.qcH6k1.rst

-The type of results of PyThread_start_new_thread() and
-PyThread_get_thread_ident(), and the id parameter of
-PyThreadState_SetAsyncExc() changed from "long" to "unsigned long".

Misc/NEWS.d/next/C API/0072.bpo-16500.lRpooa.rst

-Deprecate PyOS_AfterFork() and add PyOS_BeforeFork(),
-PyOS_AfterFork_Parent() and PyOS_AfterFork_Child().

Misc/NEWS.d/next/C API/0073.bpo-30708.np-l1j.rst

-PyUnicode_AsWideCharString() now raises a ValueError if the second argument
-is NULL and the wchar_t\* string contains null characters.

Misc/NEWS.d/next/C API/2017-07-03-17-25-40.bpo-30832.PcTAEP.rst

-Remove own implementation for thread-local storage.
-
-CPython has provided the own implementation for thread-local storage (TLS)
-on Python/thread.c, it's used in the case which a platform has not supplied
-native TLS.  However, currently all supported platforms (Windows and pthreads)
-have provided native TLS and defined the Py_HAVE_NATIVE_TLS macro with
-unconditional in any case.

Misc/NEWS.d/next/C API/2017-09-05-17-51-12.bpo-31338.LjA43Y.rst

-Added the ``Py_UNREACHABLE()`` macro for code paths which are never expected
-to be reached.  This and a few other useful macros are now documented in the
-C API manual.

Misc/NEWS.d/next/Core and Builtins/0353.bpo-26110.KRaID6.rst

-Speed-up method calls: add LOAD_METHOD and CALL_METHOD opcodes.

Misc/NEWS.d/next/Core and Builtins/0354.bpo-28721.BO9BUF.rst

-Fix asynchronous generators aclose() and athrow() to handle
-StopAsyncIteration propagation properly.

Misc/NEWS.d/next/Core and Builtins/0355.bpo-26182.a8JXK2.rst

-Fix a refleak in code that raises DeprecationWarning.

Misc/NEWS.d/next/Core and Builtins/0356.bpo-26182.jYlqTO.rst

-Raise DeprecationWarning when async and await keywords are used as
-variable/attribute/class/function name.

Misc/NEWS.d/next/Core and Builtins/0357.bpo-28120.e5xc1i.rst

-Fix dict.pop() for splitted dictionary when trying to remove a "pending key"
-(Not yet inserted in split-table). Patch by Xiang Zhang.

Misc/NEWS.d/next/Core and Builtins/0358.bpo-28126.Qf6-uQ.rst

-Replace Py_MEMCPY with memcpy(). Visual Studio can properly optimize
-memcpy().

Misc/NEWS.d/next/Core and Builtins/0359.bpo-28131.owq0wW.rst

-Fix a regression in zipimport's compile_source().  zipimport should use the
-same optimization level as the interpreter.

Misc/NEWS.d/next/Core and Builtins/0360.bpo-0.9EbOiD.rst

-Upgrade internal unicode databases to Unicode version 9.0.0.

Misc/NEWS.d/next/Core and Builtins/0361.bpo-27222.74PvFk.rst

-Clean up redundant code in long_rshift function. Thanks Oren Milman.

Misc/NEWS.d/next/Core and Builtins/0362.bpo-27441.scPKax.rst

-Remove some redundant assignments to ob_size in longobject.c. Thanks Oren
-Milman.

Misc/NEWS.d/next/Core and Builtins/0363.bpo-28192.eR6stU.rst

-Don't import readline in isolated mode.

Misc/NEWS.d/next/Core and Builtins/0364.bpo-27955.HC4pZ4.rst

-Fallback on reading /dev/urandom device when the getrandom() syscall fails
-with EPERM, for example when blocked by SECCOMP.

Misc/NEWS.d/next/Core and Builtins/0365.bpo-28214.zQF8Em.rst

-Now __set_name__ is looked up on the class instead of the instance.

Misc/NEWS.d/next/Core and Builtins/0366.bpo-28086.JsQPMQ.rst

-Single var-positional argument of tuple subtype was passed unscathed to the
-C-defined function.  Now it is converted to exact tuple.

Misc/NEWS.d/next/Core and Builtins/0367.bpo-28203.LRn5vp.rst

-Fix incorrect type in complex(1.0, {2:3}) error message. Patch by Soumya
-Sharma.

Misc/NEWS.d/next/Core and Builtins/0368.bpo-21578.GI1bhj.rst

-Fixed misleading error message when ImportError called with invalid keyword
-args.

Misc/NEWS.d/next/Core and Builtins/0369.bpo-28289.l1kHlV.rst

-ImportError.__init__ now resets not specified attributes.

Misc/NEWS.d/next/Core and Builtins/0370.bpo-27942.ZGuhns.rst

-String constants now interned recursively in tuples and frozensets.

Misc/NEWS.d/next/Core and Builtins/0371.bpo-26617.Gh5LvN.rst

-Fix crash when GC runs during weakref callbacks.

Misc/NEWS.d/next/Core and Builtins/0372.bpo-28350.8M5Eg9.rst

-String constants with null character no longer interned.

Misc/NEWS.d/next/Core and Builtins/0373.bpo-28201.GWUxAy.rst

-Dict reduces possibility of 2nd conflict in hash table when hashes have same
-lower bits.

Misc/NEWS.d/next/Core and Builtins/0374.bpo-24098.XqlP_1.rst

-Fixed possible crash when AST is changed in process of compiling it.

Misc/NEWS.d/next/Core and Builtins/0375.bpo-18287.k6jffS.rst

-PyType_Ready() now checks that tp_name is not NULL. Original patch by Niklas
-Koep.

Misc/NEWS.d/next/Core and Builtins/0376.bpo-26906.YBjcwI.rst

-Resolving special methods of uninitialized type now causes implicit
-initialization of the type instead of a fail.

Misc/NEWS.d/next/Core and Builtins/0377.bpo-28376.yTEhEo.rst

-Creating instances of range_iterator by calling range_iterator type now is
-disallowed.  Calling iter() on range instance is the only way. Patch by Oren
-Milman.

Misc/NEWS.d/next/Core and Builtins/0378.bpo-28376.oPD-5D.rst

-The type of long range iterator is now registered as Iterator. Patch by Oren
-Milman.

Misc/NEWS.d/next/Core and Builtins/0379.bpo-28379.DuXlco.rst

-Added sanity checks and tests for PyUnicode_CopyCharacters(). Patch by Xiang
-Zhang.

Misc/NEWS.d/next/Core and Builtins/0380.bpo-26081._x5vjl.rst

-Added C implementation of asyncio.Future. Original patch by Yury Selivanov.

Misc/NEWS.d/next/Core and Builtins/0381.bpo-28183.MJZeNd.rst

-Optimize and cleanup dict iteration.

Misc/NEWS.d/next/Core and Builtins/0382.bpo-23782.lonDzj.rst

-Fixed possible memory leak in _PyTraceback_Add() and exception loss in
-PyTraceBack_Here().

Misc/NEWS.d/next/Core and Builtins/0383.bpo-28214.6ECJox.rst

-Improved exception reporting for problematic __set_name__ attributes.

Misc/NEWS.d/next/Core and Builtins/0384.bpo-28517.ExPkm9.rst

-Fixed of-by-one error in the peephole optimizer that caused keeping
-unreachable code.

Misc/NEWS.d/next/Core and Builtins/0385.bpo-28426.E_quyK.rst

-Fixed potential crash in PyUnicode_AsDecodedObject() in debug build.

Misc/NEWS.d/next/Core and Builtins/0386.bpo-28509._Fa4Uq.rst

-dict.update() no longer allocate unnecessary large memory.

Misc/NEWS.d/next/Core and Builtins/0387.bpo-28128.Lc2sFu.rst

-Deprecation warning for invalid str and byte escape sequences now prints
-better information about where the error occurs. Patch by Serhiy Storchaka
-and Eric Smith.

Misc/NEWS.d/next/Core and Builtins/0388.bpo-28583.F-QAx1.rst

-PyDict_SetDefault didn't combine split table when needed. Patch by Xiang
-Zhang.

Misc/NEWS.d/next/Core and Builtins/0389.bpo-28580.8bqBmG.rst

-Optimize iterating split table values. Patch by Xiang Zhang.

Misc/NEWS.d/next/Core and Builtins/0390.bpo-28621.eCD7n-.rst

-Sped up converting int to float by reusing faster bits counting
-implementation.  Patch by Adrian Wielgosik.

Misc/NEWS.d/next/Core and Builtins/0391.bpo-19398.RYbEGH.rst

-Extra slash no longer added to sys.path components in case of empty compile-
-time PYTHONPATH components.

Misc/NEWS.d/next/Core and Builtins/0392.bpo-28665.v4nx86.rst

-Improve speed of the STORE_DEREF opcode by 40%.

Misc/NEWS.d/next/Core and Builtins/0393.bpo-28648.z7B52W.rst

-Fixed crash in Py_DecodeLocale() in debug build on Mac OS X when decode
-astral characters.  Patch by Xiang Zhang.

Misc/NEWS.d/next/Core and Builtins/0394.bpo-26920.1URwGb.rst

-Fix not getting the locale's charset upon initializing the interpreter, on
-platforms that do not have langinfo.

Misc/NEWS.d/next/Core and Builtins/0395.bpo-28746.r5MXdB.rst

-Fix the set_inheritable() file descriptor method on platforms that do not
-have the ioctl FIOCLEX and FIONCLEX commands.

Misc/NEWS.d/next/Core and Builtins/0396.bpo-27100.poVjXq.rst

-The with-statement now checks for __enter__ before it checks for __exit__.
-This gives less confusing error messages when both methods are missing.
-Patch by Jonathan Ellington.

Misc/NEWS.d/next/Core and Builtins/0397.bpo-28532.KEYJny.rst

-Show sys.version when -V option is supplied twice.

Misc/NEWS.d/next/Core and Builtins/0398.bpo-28731.oNF59u.rst

-Optimize _PyDict_NewPresized() to create correct size dict. Improve speed of
-dict literal with constant keys up to 30%.

Misc/NEWS.d/next/Core and Builtins/0399.bpo-28774.cEehAr.rst

-Fix error position of the unicode error in ASCII and Latin1 encoders when a
-string returned by the error handler contains multiple non-encodable
-characters (non-ASCII for the ASCII codec, characters out of the
-U+0000-U+00FF range for Latin1).