shore up IPNS overlay

[npfoss]

Make sure it doesn't leak who's talking to whom.

• will need to be encrypted in transit (not sure if this is default)
  • here's an example: https://github.com/libp2p/js-libp2p/tree/master/examples/encrypted-communications
• addresses being dialed probably also need to be hidden...
  • probably works to create custom address (is that possible?) and then share it with friends (so it's not just your ID)