Tvheadend

Hi! I have two questions hopefully someone can answer. I wanted TVH segmented HLS output so I could seek streams on an Android device without remuxing them after TVH, as the clients can't seek TS streams. I concluded by trying and reading forums that it can't be done because TVH outputs to "pipe" and that's a stream without a filename and so, can't be segmented. THEN I noticed that the Michael Marley repository installed a version of TVH that outputs the playlist as m3u8 instead of m3u, as my docker image does.
If I enter the URL "http://192.168.1.2:9981/playlist" the Docker image outputs 'playlist.m3u' while the Michael Marley version outputs 'playlist.m3u8'. That got me wondering if HLS is being worked on, maybe it's already functional, or what the other differences are between Linuxserver.io Docker version of TVH and Michael Marley repo version.

1. Am I right to conclude that TVH can't output a segmented stream?
2. Why does Linuxserver.io Docker TVH output playlist.m3u while the Michael Marley repository version outputs m3u8? Are there other differences?

Thanks!