2.9

svtplay: fix issue finding videos on the new site
svt: add support for downloading videos from the recpie site
urplay: fix issue finding some videos
discoveryplus: add support for it
discoveryplus: show a better error message when people need the right cookie
changed behavior when using —merge-subtitle, it will force —subtitle
add support for —only-audio and —only-video, it will only work when audio and video is separate