NameServer::new created its h3 connection state under the __tls feature instead of __h3, so every build with TLS and without HTTP/3 (ours) warned about an unused variable. hickory's main has the corrected cfg; release/0.26, which this copy comes from, doesn't yet. VENDORED.md records the change so a re-vendor past it drops it. Checked with and without HTTP/3: no warnings either way.