Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

tests/divert: use PF_DIVERT

Now all Python ports has been patched to support PF_DIVERT, and
Python kinda promises to add support in 3.12 [1].

This reverts commit 322b5b7c16666c40d2763f18c1a51e6f058

tests/divert: use PF_DIVERT

Now all Python ports has been patched to support PF_DIVERT, and
Python kinda promises to add support in 3.12 [1].

This reverts commit 322b5b7c16666c40d2763f18c1a51e6f0580d4e9.

[1] https://github.com/python/cpython/pull/96536#issuecomment-1303974686

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tests: partial revert of 4627bc1e90fd17c8d4f44de6b932d456b67661fc

Python's socketmodule isn't able to construct sockaddr when it doesn't
recognize the address family. Until this is solved in python

tests: partial revert of 4627bc1e90fd17c8d4f44de6b932d456b67661fc

Python's socketmodule isn't able to construct sockaddr when it doesn't
recognize the address family. Until this is solved in python let the
tests use the compatibility way to create divert(4) socket.

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tests: use PF_DIVERT/SOCK_RAW instead of PF_INET/SOCK_RAW/IPPROTO_DIVERT

tests/divert: fix after 2ce85919bbba (IP source address validation)

Just make the test packet more legitimate.

Reviewed by: melifaro

tests: Only log critical errors from scapy

Since 2.4.5 scapy started issuing warnings about a few different
configurations during our tests. These are harmless, but they generate
stderr output, whic

tests: Only log critical errors from scapy

Since 2.4.5 scapy started issuing warnings about a few different
configurations during our tests. These are harmless, but they generate
stderr output, which upsets atf_check.

Configure scapy to only log critical errors (and thus not warnings) to
fix these tests.

MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")

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Merge ^/head r357855 through r357920.

Add basic IPDIVERT tests.

Reviewed by: lwhsu,kp
Differential Revision: https://reviews.freebsd.org/D23316