message: Fix for don't require server name
diff: @@ -122,6 +122,7 @@ pub struct ServerInfo {
  /// The unique identifier of the NATS server.
  pub server_id: String,
  /// Generated Server Name.
  + #[serde(default)]
  pub server_name: String,
  /// The host specified in the cluster parameter/options.
  pub host: String,
  