Improved handling of nagra/seca2 tunnelling on canaldigitaal and TV Vlaanderen

= Reason for enhancement Easier configuration for canaldigitaal, TV Vlaanderen and perhaps other providers.

= Possible impacts on other features Probably none. The patch only changes behaviour in case of ecmpid=0.

= Issue Description The attached patch (based on r8735) reduces the number of entries to be added in oscam.dvbapi. It allows decoding of canaldigitaal without adding entries to oscam.dvbapi.