improvement
- support redundant streams. level controller will switch to redundant streams in case of level/fragment loading error/timeout.
API change
- also provide manifest loading stats in MANIFEST_PARSED event
bugfixes
- ensure that FRAG_CHANGED event is triggered at startup, when first video frame is displayed and playback is paused.
- tsdemuxer: support streams longer than 2^32/90000 = 13hours
- handle playlist/fragments timestamp drift that could happen on long playlists
- tsdemuxer : workaround any kind of timestamp looping happening on long streams