Dmitriy Matrenichev f8c556a1ce
chore: listen for dns requests on 127.0.0.53
Turns out there is actually no black magic in systemd, they simply listen on 127.0.0.53 and forward dns requests there in resolv.conf.
Reason is the same as ours — to preserve compatibility with other applications. So we do the same in our code.

This PR also does two things:
- Adds `::1` into resolv.conf for IPv6 only resolvers.
- Drops `SO_REUSEPORT` from control options (it works without them).

Closes #8328

Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
2024-02-26 20:59:12 +03:00
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