GitLab

MVP for #6097

This feature will repeatedly reconnect (with a randomized exponential backoff)
to peers in a set of "peered" peers.

In the future, this should be extended to:

1. Include a CLI for modifying this list at runtime.
2. Include additional options for peers we want to _protect_ but not connect to.
3. Allow configuring timeouts, backoff, etc.
4. Allow groups? Possibly through textile threads.
5. Allow for runtime-only peering rules.
6. Different reconnect policies.

But this MVP should be a significant step forward.