Add specifying parameters in the configuration file

[paolosezart]

It would be really nice if there was an option to specify parameters for ttyd in the config file. In this case the program launch could be
ttyd -conf config.cfg
This would hide the display of login and password in the command line.
Also, if the developer decides to add an option with the config file, you could implement picking up the config file if it has the same name as ttyd.
For example, if there is a ttyd.cfg file in the working directory next to ttyd, then running ttyd without command line parameters would pick up the settings from ttyd.cfg.