fix: update NDR channels

[poika-xy]

Fixes HLS stream URLs

[bjoerns1983]

Would you mind using the generice master.m3u8 instead of the master_720.m3u8?
So the client could switch between the different resolutions depending on the network speed.

[poika-xy]

Personally, I do prefer the master.m3u8 too.
In #406 (comment) it said:
direct high quality streams > master streams* (eg. index_3096_av-p.m3u8 vs master.m3u8)
and
*The reason for this have been the faster channel switches in the past. This however requires frequent changes to stream URLs as most of you have seen in the past. The 'master' link should be working even when a direct stream URL would have to be changed.

Therefore I extracted the highest resolution stream.

Could one of the maintainers please state a clear policy (on which .m3u8 URL to choose) in either:
https://github.com/jnk22/kodinerds-iptv/blob/master/CONTRIBUTING.md
or
https://github.com/jnk22/kodinerds-iptv/blob/master/README.md

Edit:
Of course I know some broadcasters might make it quite hard to extract only the high quality stream, i.e. newer HLS/m3u8 standards, separate the audio and video streams their master.m3u8. In these cases the master.m3u8 will become the only reasonable solution.

Concerning the comments from the issue: "The reason for this have been the faster channel switches in the past." could be addressed easily if the underlying software (kodi?) would probe the IPTV streams in background and cache the video and audio streams, available in the master.m3u8. (To me it seems that VLC and ffplay/ffmpeg sometimes take quite a long time to start playback since they seem to test playback of all streams and then select the highest quality streams... But I could be mistaken)

[jnk22]

@poika-xy You are right, this has not been properly defined before. I have created a PR with an updated CONTRIBUTING.md file: #571

[bjoerns1983]

Okay should be clear now.
@poika-xy would you add the master.m3u8 links or should i do that?

[poika-xy]

@bjoerns1983, I'll do it now.

[poika-xy]

Ok, everything should be ready to merge. All stream URLs were tested.

@jnk22 @bjoerns1983 Thank you for adding clarifying statements :)