Tvheadend

Problem:
some home cinema/network devices cannot properly recognise TVHeadend's generated playlists. The /playlist/channels.m3u one is an exception, this does work.

Cause:
by not supporting the proper file extension or content-type in the URL's, most devices don't recognise the .m3u file as a proper playlist.

Details for a fix:
URL's to playlists should include file extensions and/or the correct content-type: audio/mpegurl for .m3u instead of audio/x-mpegurl
The generated playlists that link to other playlists (chaining) should contain URL's that include the .m3u file extension.

As per specifications here: http://tools.ietf.org/html/draft-pantos-http-live-streaming-08#section-3.1

These are the situations I could think of:

URL fragment                > Description
/playlist/channels          > alias for channels.m3u
/playlist/channels.m3u      > channel sort is ok (by customized channelnumber)
/playlist/tags              > alias for tags.m3u
/playlist/tags.m3u          > tag sort is not ok (by UI appearance/tagid?), should be sorted by custom tag index or tagname (alphabetically ASC)
/playlist/tagid/*           > alias for *.m3u
/playlist/tagid/*.m3u       > channel sort is not ok (by channelId?), should be sorted by customized channel number
/playlist/tag/*             > alias for *.m3u
/playlist/tag/*.m3u         > channel sort is not ok (by channelId?), should be sorted by customized channel number