DummyRepeater: only numbers accepted for QRG, no option for TCP/IP only

[DF1CHB]

config file:
frequency=TCP.IP
offset=-0.0

Result:
[2022-01-05 11:55:59] [ERROR ] Configuration error: repeater_2.frequency is not a valid floating point number (TCP.IP)
[2022-01-05 11:55:59] [ERROR ] Configuration error: no repeaters configured !
[2022-01-05 11:55:59] [ERROR ] Loading Configuration from /usr/local/etc/dstargateway.cfg failed
[2022-01-05 11:55:59] [FATAL ] Invalid configuration, aborting

config file:
frequency=000.000
offset=-0.0

Result:
[2022-01-05 12:00:48] [ERROR ] Configuration error: repeater_2.frequency is out of range must be between 0.100000 and 1500.000000, actual 0.000000
[2022-01-05 12:00:48] [ERROR ] Configuration error: no repeaters configured !
[2022-01-05 12:00:48] [ERROR ] Loading Configuration from /usr/local/etc/dstargateway.cfg failed
[2022-01-05 12:00:48] [FATAL ] Invalid configuration, aborting

config file:
frequency=999.999
offset=-0.0

Result:
[2022-01-05 12:02:55] [INFO ] QRG: F1MHV__E 00999.99900 -000.00000 000.00 0001.0