[vdr] [Feature request] Always prefer DD-track

[Antti Hartikainen]

Hi.

I can't find feature that prefers always Dolby Digital/DTS track, 
even there it's not preferred language, and there is MPEG track in 
preferred language.

Some channels (like canal+) has 4 MPEG audio tracks (fin, swe, nor, 
dan) and one DD-track (which is eng or nor, depending on 
channel). I have 2 preferred languages; finnish as primary and 
english as secondary. VDR always chooses finnish MPEG-audio as 
default audio track.

I would like to _ALWAYS_ prefer dolby digital (if present) track as 
default, even if it's not on preferred languages.