Co-Authored-By: Petr Viktorin <encukou@gmail.com>

test__issue1864.py: Disable on Python 2.7; it failed there for reasons that aren't clear. I verified that Ofast or fast-math was not given. Perhaps some underlying lib had that set?

I'm not very concerned about it though.

This one is available in older versions of Python

The release script has been updated to not keep verbose
comments about a past regression. Link to the PR that
describes the regression instead

-pipe tells gcc to use pipes instead of temporary files, which
in general leads to faster compile time, making it a kind of an
optimization flag

I do not reproduce locally on mac, with matching pylint and astroid versions.

See https://github.com/gevent/gevent/actions/runs/3042157082/jobs/5192451149

Fix various build and test failures

```
$ pypy
Python 2.7.18 (596a3d4905d6452b2ac871c1b39dea68418b4f64, May 29 2022, 00:39:20)
...
>>>> from ssl import SSLSyscallError
>>>> SSLSyscallError.__mro__
(<class '_cffi_ssl._stdssl.error.SSLSyscallError'>, <class '_cffi_ssl._stdssl.error.SSLError'>, <class '_socket.error'>, <type 'exceptions.IOError'>, <type 'exceptions.EnvironmentError'>, <typ
e 'exceptions.StandardError'>, <type 'exceptions.Exception'>, <type 'exceptions.BaseException'>, <type 'object'>)
```

Where I think _socket.error is defined:
https://github.com/mozillazg/pypy/blob/release-pypy2.7-v7.3.9/pypy/module/_socket/interp_socket.py#L679-L680

'no-self-use' was moved to an optional extension, i.e. it's now
disabled by default, so no need to expicitly disable it

bad-functions is an option recognized by the bad-builtin
checker, which used to be enabled by default but is now
an optional plugin:
https://pylint.pycqa.org/en/v2.15.2/user_guide/checkers/extensions.html#deprecated-builtins-checker-documentation

The version range in setup.py's greenlet_requires variable is
>=1.1.0, <2.0, but in CI, the upper limit was not specified.

greenlet v2.0.0a1 is out now, and since its PyGreenlet's
data structure is not backwards compatible, geven'ts build
was failing.

Improved documentation of link() and rawlink()

Update to libuv 1.42.0

fixes #1851

Upgrade embedded c-ares to 1.18.1

Fixes #1847

Add pypy3.7 to Appveyor.

Fixes #1798.

Add test_signal for all versions.

Give up and disable test_signal on PyPy/Win. It hangs without running any tests.

Disable test__threading_vs_settrace on PyPy3/Appveyor. Somehow it fails to launch the script for unknown reasons.

.misc doesn't get put in the changelog by towncrier.

.misc doesn't get put in the changelog by towncrier.

Adding musllinux binary wheels and testing.