Use Akka.net as SignalR Backplane

[JTrotta]

Is your feature request related to a problem? Please describe.
I would like to use AKKA.net as SignalR Backplane, likewise REDIS.

Describe the solution you'd like
The idea is to create a cluster of ASPNET sites and stream SignalR message from clients connected to one cluster node to all other clients connected to other nodes.

Describe alternatives you've considered
I'm using StreamConnection has SignaR Hub on each node, then I send received message to a ReceiveActor, but I cannot resend messagges back to SignalR clients from the ReceiveActor

Additional context