Server crashes, if client sends nonexistent command.

[yernende]

If client sends nonexistent command, server crashes with such error:

node_modules\telnet\lib\telnet.js:153
  return COMMAND_IMPLS[command](bufs, i + 1, event)
                               ^
TypeError: undefined is not a function

The same error occurs with correct command, but incorrect option.

[dazhazit]

Same for me if I type Control-C in a telnet connection.
I get;-
TypeError: Property '248' of object # is not a function
at parseCommand (C:\CamOnline\branches\Arthur\node_modules\telnet\lib\telnet.js:153:32)

[spragchris]

This is a show-stopper. Control-C from a client crashes the entire server.