[prosiebensat1] Add support for playlists (fixes #4357)
[prosiebensat1] Fix broken tests
[extractor/common] Add description to playlist_result
[prosiebensat1] Improve and simplify
Merge branch 'akretz-master'
Credit @akretz for prosiebensat1 playlist support (#4394)
[nhl] Make sure we add '_sd' before the extension (fixes #4397)

'.replace' would find the first dot in the path.