Hi All!

I've backported NDI from CasparCG Server 2.2 to CasparCG Server 2.1, and have added some functionality to set a failover NDI source via config file.

Setting it works fine, and for example the windows studio application fails over nicely if I shut down CasparCG

However Linux NDI consumers I've tested are not failing over; I've tested with both OBS-Studio and OBE-RT encoder neither seems to failover to the backup source. Both use 'NDIlib_recv_capture_v2' to capture, is there a setting I'm forgetting to set somewhere on the connection or elsewhere?