Accept bytes for Unix socket paths.

[Fuyukai]

*nix paths are an arbitrary sequence of bytes.

[agronholm]

While this is almost an annotations only patch, it does replace the use of str(). Perhaps there should be a test that creates a socket from a bytes-based path that doesn't cleanly translate to ASCII?

[Fuyukai]

What would that actually be testing? It's just passed straight through to the underlying socket.

[agronholm]

It would test that a bytes-based socket path would not result in UnicodeDecodeError, as it could without this patch.

[agronholm]

It's even clearer now that I tried:

>>> Path(b"/tmp/foo2")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib64/python3.12/pathlib.py", line 1163, in __init__
    super().__init__(*args)
  File "/usr/lib64/python3.12/pathlib.py", line 373, in __init__
    raise TypeError(
TypeError: argument should be a str or an os.PathLike object where __fspath__ returns a str, not 'bytes'

[Fuyukai]

Also added bytes supports for the other methods and added tests for each distinct one.

I had to duplicate a bit of logic from Pathlib around stat()ing.

[agronholm]

Also please add a changelog entry in docs/versionhistory.rst (under **UNRELEASED**, as there are no changes yet since the last release).

[agronholm]

LGTM now, thanks!