Emit event when a peer you've already connected to is found for another topic

[RangerMauve]

Some peers will be advertising on multiple topics that you both share. Instead of establishing a new connection to that peer per topic, it'd be useful to let the application optionally multiplex existing connections.

For example, if I subscribe to topic foo, and find a peer, then subscribe to topic bar, and find that same peer again, I'd like to be able to ask peer for bar over our foo connection instead of establishing a new tunnel.

This should help for applications like collaborative editors that might have a large amount of hyperdrives or hypercores shared between a few peers.

cc @pvh

[mafintosh]

Yep, we are already working on this - should land soon

[RangerMauve]

Any updates?

[mafintosh]

got released