3.9.1

Add support for different audio languages and roles (see —list-quality to find what is available)
cmore: fix so —all-episodes work again and add dash streams support
tv4play: add dash stream support
discoveryplus: add support for standalone videos
Improve —list-quality output
Renamed dplay to discoveryplus, viaplay to viafree. display a warning message if the old names still in use.
Added —no-remux, —no-merge, —no-postprocess and —keep-original.