* bpo-29136: Add TLS 1.3 support

TLS 1.3 introduces a new, distinct set of cipher suites. The TLS 1.3
cipher suites don't overlap with cipher suites from TLS 1.2 and earlier.
Since Python sets its own set of permitted ciphers, TLS 1.3 handshake
will fail as soon as OpenSSL 1.1.1 is released. Let's enable the common
AES-GCM and ChaCha20 suites.

Additionally the flag OP_NO_TLSv1_3 is added. It defaults to 0 (no op) with
OpenSSL prior to 1.1.1. This allows applications to opt-out from TLS 1.3
now.
Signed-off-by: Christian Heimes <christian@python.org>

Remove redundant PyUnicode_Check call. Use a static table for checking chars.

Rather than requiring the path to blurb and/or sphinx-build to be specified to the make rule, enhance the Doc/Makefile to look for each first in a virtual environment created by make venv and, if not found, look on the normal process PATH. This allows the Doc/Makefile to take advantage of an installed spinx-build or blurb and, thus, do the right thing most of the time. Also, make the directory for the venv be configurable and document the `make venv` target.

f_trace_lines: enable/disable line trace events
f_trace_opcodes: enable/disable opcode trace events

These are intended primarily for testing of the interpreter
itself, as they make it much easier to emulate signals
arriving at unfortunate times.

To match the documentation updates already made.
Also renames the local variable used within to match
what it actually holds.

* bpo-27340: Use memoryview in SSLSocket.sendall()

SSLSocket.sendall() now uses memoryview to create slices of data. This fix
support for all bytes-like object. It is also more efficient and avoids
costly copies.
Signed-off-by: Christian Heimes <christian@python.org>

* Cast view to bytes, fix typo
Signed-off-by: Christian Heimes <christian@python.org>

Signed-off-by: Christian Heimes <christian@python.org>

* bpo-31270: Simplify documentation of itertools.zip_longest

* Use repeat(). Track num_active.

Signed-off-by: Christian Heimes <christian@python.org>

* Fix ZeroMQSocketListener and ZeroMQSocketHandler examples

* Use send_json and recv_json to simplify pyzmq interfacing

* Add News entry

Also provide a solution if the user wants to keep multiple blank lines.

* Remove Setup.config
* Always define WITH_THREAD for compatibility.

Signed-off-by: Christian Heimes <christian@python.org>

This fixes the gcc "warning: this use of "defined" may not be portable [-Wexpansion-to-defined]"

See discussion in http://bugs.python.org/issue29505

The `subprocess.getstatusoutput` API was inadvertently changed
in Python 3.3.4.  Document the change, it is too late to undo the
API change now as it has shipped in many stable releases.

Also enable building externals by default on Windows, use PCbuild\build.bat's -E option to disable it.

For f-string ast nodes, fix the line and columns so that tools such as flake8 can identify them correctly.

Explain that backport PR should include branch name and the original PR number.

This adds support for parsing a command line where options and positionals are intermixed as is common in many unix commands. This is paul.j3's patch with a few tweaks.

Signed-off-by: Christian Heimes <christian@python.org>

It was mostly removed long ago.

* bpo-27584: New addition of vSockets to the python socket module

Support for AF_VSOCK on Linux only

* bpo-27584: Fixes for V2

Fixed syntax and naming problems.
Fixed #ifdef AF_VSOCK checking
Restored original aclocal.m4

* bpo-27584: Fixes for V3

Added checking for fcntl and thread modules.

* bpo-27584: Fixes for V4

Fixed white space error

* bpo-27584: Fixes for V5

Added back comma in (CID, port).

* bpo-27584: Fixes for V6

Added news file.
socket.rst now reflects first Linux introduction of AF_VSOCK.
Fixed get_cid in test_socket.py.
Replaced PyLong_FromLong with PyLong_FromUnsignedLong in socketmodule.c
Got rid of extra AF_VSOCK #define.
Added sockaddr_vm to sock_addr.

* bpo-27584: Fixes for V7

Minor cleanup.

* bpo-27584: Fixes for V8

Put back #undef AF_VSOCK as it is  necessary when vm_sockets.h is not installed.

Various platforms have various methods of handling multiarch libffi which probably won't match the previously looked-for defines.  Now we just make sure that ffi.h is available.

Add basic fuzz tests for a few common builtin functions.

This is an easy place to start, and these functions are probably safe.
We'll want to add more fuzz tests later.  Lets bootstrap using these.

While the fuzz tests are included in CPython and compiled / tested on a
very basic level inside CPython itself, the actual fuzzing happens as
part of oss-fuzz (https://github.com/google/oss-fuzz). The reason to
include the tests in CPython is to make sure that they're maintained
as part of the CPython project, especially when (as some eventually
will) they use internal implementation details in the test.

(This will be necessary sometimes because e.g. the fuzz test should
never enter Python's interpreter loop, whereas some APIs only expose
themselves publicly as Python functions.)

This particular set of changes is part of testing Python's builtins,
tracked internally at Google by b/37562550.

The _xxtestfuzz module that this change adds need not be shipped with binary distributions of Python.

This reverts commit 83386061, as it broke Windows builds.

Avoid concatenating bytes with str in the typically rare subprocess error path (exec failed). Includes a mock based unittest to exercise the codepath.

SSLObject.version() now correctly returns None when handshake over BIO has
not been performed yet.
Signed-off-by: Christian Heimes <christian@python.org>

One test case of test_xmlrpc uses HTTPServer with a subclass of
BaseHTTPRequestHandler. The BaseRequestHandler class logs to
sys.stderr by default. Override log_message() to not clobber
test output.
Signed-off-by: Christian Heimes <christian@python.org>

Windows buildbots started failing due to include-related errors.

Explicitly initialize struct members rather than relying on compiler extensions.

* group the (stateful) runtime globals into various topical structs
* consolidate the topical structs under a single top-level _PyRuntimeState struct
* add a check-c-globals.py script that helps identify runtime globals

Other globals are excluded (see globals.txt and check-c-globals.py).