Some netcat versions are not command-line compatible

[ha7ilm]

On some linux distros, when starting OpenWebRX, you may get an error message corresponding to nc.

A temporary fix is to replace

nc -vvl 127.0.0.1 -p 8888

with

nc -l 127.0.0.1 8888

in _configwebrx.py

[ha7ilm]

Should be fixed with the current version.