Reconnect timeout needed (or eliminate reconnects)

[tagdara]

A reconnect is attempted on a ECONNRESET without any throttling, causing a potential DOS of the elk device. This is causing downstream issues seen in homebridge-elkm1.

paulw11/homebridge-elkm1#35

I'm not sure, based on other use cases for elkmon, whether a throttle or a removal of the single use case retry would be better, but it should be consistent across errors and have a way to prevent overloading the device. Even adding a 5 second timeout before the retry would prevent most negative effects.

    // error event handler
    this.connection.on('error', (err) => {
      if (err.code === 'ECONNREFUSED') {
        this.emit('error', 'Connection to M1XEP failed!');
      } else if (err.code === 'ECONNRESET') {
        this.emit('error', err.code);
        // connection was reset, attempt to reconnect
        if (this.connection) {
          this.connection.destroy();
        }
        this.connect();
      } else {
        this.emit('error', err.code);
      }
    });