flash_baudrate in config, no connection to Arduino

[brummbaer]

I had a problem to get my Arduino UNO serial to talk with FabScanPi-Server.
After adding flash_baudrate 115200 in config file it is working.

Because FSSerial.py is searching for flash_baudrate but there is no such setting in serial section.
It falls back to 57600 every time, to find a compatible Arduino.