plugins.youtube: use new "hlsManifestUrl" for Livestreams (#2238)
plugins.youtube: use new "hlsManifestUrl" for Livestreams (#2238)

closes https://github.com/streamlink/streamlink/issues/2237

gravyboat/streamlink,melmorabity/streamlink,melmorabity/streamlink,beardypig/streamlink,wlerin/streamlink,bastimeyer/streamlink,streamlink/streamlink,wlerin/streamlink,beardypig/streamlink,chhe/streamlink,gravyboat/streamlink,bastimeyer/streamlink,streamlink/streamlink,chhe/streamlink