Only connect to bootstrap nodes from nodes that are insufficiently well connected #466
Description
In order to not swamp bootstrap nodes with connection attempts, a node that is well connected should leave bootstrap nodes alone.
- Add a new peer message to communicate the own bootstrap status
- Persistently record the bootstrap status of peers
- Stop connecting to bootstrap nodes if there are enough peers
Some open design decisions:
- What does “well connected” mean? Should this be a CLI argument? A hardcoded number, like 6 peers? A ratio, like 80% of max_num_peers?
- …
(This is the other side of the #411-coin.)