Support for DRM and other non-standard streams

[kevev]

Is your feature request related to a problem? Please describe.
It would be nice to have support for DRM streams(Widevine, etc). They have extra lines that are required in the playlist.
Ex.
#EXTINF:-1 tvg-id="CHANNEL_ID" tvg-logo="https://web.site/channel-logo.png" group-title="Some Group" ,Channel Name
#KODIPROP:inputstream.adaptive.manifest_type=mpd
#KODIPROP:inputstream.adaptive.license_type=com.widevine.alpha
#KODIPROP:inputstream.adaptive.license_key=https://proxy.drm.web.site/license/widevine/1234e678-2d3a-0987-12c4-a84b93d37-dash|Content-Type=application%2Foctet-stream&user-agent=okhttp%2F4.9.0|R{SSM}|
https://klrndt.lls.web.site/out/v1/1a2b3c4d5e6f7g8h9/dash-drm.mpd|user-agent=okhttp%2F4.9.0

Describe the solution you'd like
I am wondering if it would be best to just copy and forward extra lines from origin Playlist to destination Playlist.
This should hopefully cover all non-standard playlists and non-standard channel entries.

Describe alternatives you've considered
NA

Additional context
NA

[sparkison]

I've added the KODIPROP tag in the latest release to make sure those variables are retained from the provider 😉