GH-93316 socketmodule allow negative backlog for macOs and FreeBSD

[devnexen (David CARLIER)]

Hi, Provided a PR to allow it for these oses, so they are implicitly set to SOMAXCONN.

[guido (Guido van Rossum)]

Hi David,

I take it you are trying to start a discussion regarding your issue socketmodule sock_listen accepts backlog negative arg on macOs and FreeBSD · Issue #93316 · python/cpython · GitHub ?