DVDDemuxFFmpeg: fix mixed-up internal/external stream ids
DVDDemuxFFmpeg: do not discard packets of unknown streams
DVDDemuxFFmpeg: fix segfault when playing blurays
Merge pull request #2701 from FernetMenta/streamfix

dmuxer streams: some fixes after #1757
Merge pull request #2716 from lars-a/master

musicdb: missing comma in SQL statement for creation of albumview