Solved it!
Solution was actually quite easy:
From this post I got the impression that Domoticz requires that the Open ZWave USB hardware MUST be on /dev/ttyACM0.
Turns out: Domoticz accepts ANY /dev/ttyACM* device.
So changed the symlink for the ZWave to /dev/ttyACMZwave
Then suddenly Domoticz saw 2 serial ports, one for the ZWave (/dev/ttyACMZwave), the other (/dev/ACM0) the RFlink was on and working...
Solution was actually quite easy:
From this post I got the impression that Domoticz requires that the Open ZWave USB hardware MUST be on /dev/ttyACM0.
Turns out: Domoticz accepts ANY /dev/ttyACM* device.
So changed the symlink for the ZWave to /dev/ttyACMZwave
Then suddenly Domoticz saw 2 serial ports, one for the ZWave (/dev/ttyACMZwave), the other (/dev/ACM0) the RFlink was on and working...