Varying user/group/permission check needs on platforms.

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

* bpo-38148: Add slots to asyncio transports

* Update Misc/NEWS.d/next/Library/2019-09-13-08-55-43.bpo-38148.Lnww6D.rst
Co-Authored-By: Kyle Stanley <aeros167@gmail.com>

bpo-12707: deprecate info(), geturl(), getcode() methods in favor of headers, url, and status properties for HTTPResponse and addinfourl (GH-11447)
Co-Authored-By: epicfaace <aramaswamis@gmail.com>

Handle time comparison for cookies with `expires` attribute when `CookieJar.make_cookies` is called.
Co-authored-by: Demian Brecht <demianbrecht@gmail.com>


https://bugs.python.org/issue12144



Automerge-Triggered-By: @asvetlov

* This just copies the docs from `StreamWriter` and `StreamReader`.
* Add docstring for asyncio functions.


https://bugs.python.org/issue36889



Automerge-Triggered-By: @asvetlov

Co-Authored-By: remilapeyre <remi.lapeyre@henki.fr>

- Migrate `Random_Type` to `PyType_FromSpec`
- To simulate an old use of `PyLong_Type.tp_as_number->nb_absolute`, I added
  code to the module init function to stash `int.__abs__` for later
  use. Ideally we'd use `PyType_GetSlot()` instead, but it doesn't currently
  work for static types in CPython, and implementing it just for this case
  doesn't seem worth it.
- Do exact check for long and dispatch to PyNumber_Absolute, use vector call when not exact.

The usedforsecurity keyword only argument added to the hash constructors is useful for FIPS builds and similar restrictive environment with non-technical requirements that legacy algorithms be forbidden by their implementations without being explicitly annotated as not being used for any security related purposes.  Linux distros with FIPS support benefit from this being standard rather than making up their own way(s) to do it.

Contributed and Signed-off-by: Christian Heimes christian@python.org

All call sites pass NULL for `recode_encoding`, so this path is
completely untested.  That's been true since before Python 3.0.
It adds significant complexity to this logic, so it's best to
take it out.

All call sites now have a literal NULL, and that's been true since
commit 768921cf eliminated a conditional (`foo ? bar : NULL`) at
the call site in Python/ast.c where we're parsing a bytes literal.
But even before then, that condition `foo` had been a constant
since unadorned string literals started meaning Unicode, in commit
572dbf8f aka v3.0a1~1035 .

The `unicode` parameter is already unused, so mark it as unused too.
The code that acted on it was also taken out before Python 3.0, in
commit 8d30cc01 aka v3.0a1~1031 .

The function (PyBytes_DecodeEscape) is exposed in the API, but it's
never been documented.

* subprocess: Add user, group and extra_groups paremeters to subprocess.Popen

This adds a `user` parameter to the Popen constructor that will call
setreuid() in the child before calling exec(). This allows processes
running as root to safely drop privileges before running the subprocess
without having to use a preexec_fn.

This also adds a `group` parameter that will call setregid() in
the child process before calling exec().

Finally an `extra_groups` parameter was added that will call
setgroups() to set the supplimental groups.

The "--" should not be included with long options passed to
getopt.getopt.

Fixes https://bugs.python.org/issue37803

Co-Authored-By: Brandt Bucher <brandtbucher@gmail.com>

Interned string needs to be decref'd



https://bugs.python.org/issue38138



Automerge-Triggered-By: @matrixise

The defines are required for OpenSSL 1.0.2 and LibreSSL.


https://bugs.python.org/issue38134



Automerge-Triggered-By: @tiran

* 1. add test case with wrong behavior
* 2. fix bug when max_length == -1
* 3. allow b"" as valid input data for decompress_buf()
* 4. when max_length >= 0, let needs_input mechanism works
* add more asserts to test case

This reverts commit 355f3e1e.

bpo-38135

Three internal cpython events were not documented, yet.
Signed-off-by: Christian Heimes <christian@python.org>



https://bugs.python.org/issue37363

Test that they do not keep too many file descriptors open for the host OS in a reasonable test scenario.

See [bpo-37935](https://bugs.python.org/issue37935).

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