#### Changes regarding misbehaving peers

Peers that misbehave (e.g. send us invalid blocks) are now referred to as
discouraged nodes in log output, as they're not (and weren't) strictly banned:
incoming connections are still allowed from them, but they're preferred for
eviction.

Furthermore, a few additional changes are introduced to how discouraged
addresses are treated:

- Discouraging an address does not time out automatically after 24 hours
  (or the `-bantime` setting). Depending on traffic from other peers,
  discouragement may time out at an indeterminate time.

- Discouragement is not persisted over restarts.

- There is no method to list discouraged addresses. They are not returned by
  the `listbanned` RPC. That RPC also no longer reports the `ban_reason`
  field, as `"manually added"` is the only remaining option.

- Discouragement cannot be removed with the `setban remove` RPC command.
  If you need to remove a discouragement, you can remove all discouragements by
  stop-starting your node.