Add SO_PASSRIGHTS constant to socket module

Feature or enhancement

Proposal:

Linux recently added support to SO_PASSRIGHTS, to prevent unix sockets from receiving file descriptors.

Python should have this constant to be able to use it with setsockopt.

import socket
socket.SO_PASSRIGHTS

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-135355

首先检查 Python 的 socket 模块如何公开平台 socket 常量，以及 setsockopt 如何使用这些常量。查看已链接的 PR gh-135355，了解已经在进行的工作。当 socket.SO_PASSRIGHTS 可在受支持的 Linux 系统上与 setsockopt 一起使用时，即视为完成。