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DNSBLs such as Spamhaus refuse queries that arrive via public resolvers, and forwarding everything to 8.8.8.8/1.1.1.1 leaves the estate dependent on them. The lab resolvers now do full recursion themselves (DNSSEC-validated via the operator default `dnssec-validation auto` and BIND built-in root hints). - drop the global forwarders from the bind-resolvers BindCluster - keep the per-zone forwarders for unkin.net, consul, k8s and reverse zones unchanged Reviewed-on: #546 Co-authored-by: unkin-agent <unkin-agent@unkin.net> Co-committed-by: unkin-agent <unkin-agent@unkin.net>