Controller Trait is not externally implementable anymore

[BiagioFesta]

With the new release 0.8.0, the trait Controller cannot be implemented (e.g. a custom congestion controller) because the method on_ack requires RttEstimator which seems to not be pub re-exported.

Or am I missing something? (in that case I apologize for my laziness in not had a deeper check and I am going to immediately close this issue).

The trait and the library design with dyn polymorphism seems to encourage the possibility to implement a custom cc.
Considering this was allowed before and I don't find any relevant in the release notes.

Waiting for feedback. If needed, I will be glad to open a small PR to fix this.

[djc]

Yes, I think this is just an oversight and we should make RttEstimator public.

[Ralith]

Thanks for catching this; a PR would be very welcome!

[Ralith]

Fixed by #1243.