[Github Issue] Resolver hotplug hook
https://github.com/CZ-NIC/turris-os-packages/issues/13
DO NOT EDIT HERE! Copy fromWhen an upstream interface get up later than a resolver, user preferred upstream forwarding of DNS queries is not followed. This PR fixes it both for knot-resolver
and for unbound
(where it used to work before migrating to resolver-config
unified configuration).
Original bug report: https://forum.turris.cz/t/dns-forwarding-stops-working/1817
Not thoughtfully tested as my WAN starts early. But it should work.