private void FixFlags(Message message, ServerEndPoint server)
        {
            // since the server is specified explicitly, we don't want defaults
            // to make the "non-preferred-endpoint" counters look artificially
            // inflated; note we only change *prefer* options
            switch (Message.GetMasterSlaveFlags(message.Flags))
            {
            case CommandFlags.PreferMaster:
                if (server.IsSlave)
                {
                    message.SetPreferSlave();
                }
                break;

            case CommandFlags.PreferSlave:
                if (!server.IsSlave)
                {
                    message.SetPreferMaster();
                }
                break;
            }
        }