message: "dns" key is only work for trust-dns feature
diff: @@ -1461,6 +1461,8 @@ impl Config {
  }
  // DNS
  + #[cfg(feature = "trust-dns")]
  + {
  nconfig.dns = match config.dns {
  Some(SSDnsConfig::Simple(ds)) => {
  match &ds[..] {
  @@ -1530,6 +1532,7 @@ impl Config {
  Some(SSDnsConfig::TrustDns(c)) => Some(c),
  None => None,
  };
  + }
  // Mode
  if let Some(m) = config.mode {
  