Mapping of channels to grabber/xmltvid combination (maybe better done similar to the channel icons?)
- DVB identifiers (Original Network ID, (Transport ID,) Service ID -> xmltvid
- bouqet name, service name -> xmltvid
- ETSI CNI (ETSI Country and Network Identification) <-> channel name
- ETSI CNI <-> DVB identifiers
- ETSI CNI <-> xmltvid