Add HLS support up to version 7 of the protocol

[zanes2016]

Is there any work being done on this? Do anyone have a estimate on the amount of work that would be required to support up to version 7?

[bradleyfalzon]

There's no direct work being done on it, if there are particular features in version 7 that you require, it's possible those could be implemented depending on the scope. But PRs will be welcome and we can walk through those if required.