socketmodule: FreeBSD PF_DIVERT is missing in getsockaddrlen()

[glebius]

Bug report

Bug description:

from socket import socket, PF_DIVERT, SOCK_RAW
with socket(PF_DIVERT, SOCK_RAW, 0) as fd:
        r = fd.recvfrom(16384)

The above fails, while must work. This is my miss with submission #96536. Opening pull request shortly.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Other

Linked PRs

• gh-142991: socketmodule: fixed getsockaddrlen() for PF_DIVERT socket #142993
• [3.14] gh-142991: socketmodule: fixed getsockaddrlen() for PF_DIVERT socket (GH-142993) #143481
• [3.13] gh-142991: socketmodule: fixed getsockaddrlen() for PF_DIVERT socket (GH-142993) #143482
• [3.13] gh-142991: Fix socketmodule.c build: remove _Py_FALLTHROUGH #143514