message: Set missing ipv6_first in manager
  fix
diff: @@ -65,6 +65,7 @@ pub async fn run(config: Config) -> io::Result<()> {
  if let Some(resolver) = build_dns_resolver(config.dns, config.ipv6_first, &connect_opts).await {
  manager.set_dns_resolver(Arc::new(resolver));
  }
  + manager.set_ipv6_first(config.ipv6_first);
  manager.set_connect_opts(connect_opts);
  manager.set_accept_opts(accept_opts);
  