Listener as IPNS record publisher

[Winterhuman]

(Jaguwr came up with this idea)

Right now, the Publisher is the only node which publishes the IPNS records, the problem with this is that Gateways have to search the DHT to find the IPNS record, this is very slow. Meanwhile, the Listener has a peered connection to the Gateway which could get around this problem. So let's do that.

Using ipfs dht get to grab the IPNS record from the Publisher, and ipfs dht put to import it into the Listener, means the Gateway can now fetch the IPNS record over the peered connection it has with the Listener. This is significantly faster and reduces the load on the internal IPFS node of the Gateway.