Named and Parallel Channels

[Bathtor]

Allow specifying a virtual channel identifier (i.e. a "name") to an actor path, in order to separate logical flows of data in the system (alá Partisan).

Also allow configuration of multiple open channels between two hosts and load balancing (or channel assigning) between them to increase throughput on high-BDP links while maintaining FIFO guarantees.

Tasks

• Implement
• Write tutorial(s)