Does HLS take advantage of the features provided by HTTP/2 standart
All i found on the internet are articles about DASH + HTTP/2
HTTP/2 and HLS
Since the HLS spec doesn't really talk about that low a level I'm not sure what you are looking for.
In iOS 9 the netowrking framework supports HTTP/2, so requests made for HLS playlists and segments will use HTTP/2 if the server supports it.
See the answer in https://forums.developer.apple.com/thread/11991 for a little more detail on that.