====== DTN2 src walk ======
===== DTN2 Discovery =====
==== Starting point DTND::main() ====

    DTND::main(...) 
    {
        ...
        DTNServer* dtnserver = new...
        APIServer* apiserver = new... 
    
        dtnserver->init();
        ...
        dtnserver->parse_conf_file(conf_file_, conf_file_set_)
        ...
        dtnserver->start();
    }
    
==== DTNServer::init() ====
init_command() inits all possible commands which can be used to execute commands in config file.

    DTNServer::init()
    {
        init_command();
        init_component();
    }    
    

==== DTNServer::parse_conf_file() ====

Parse_conf_file uses the created tcl commands to execute commands in conf file.