improve the bonds query

[tzemanovic]

The anomac bonds --validator <validator-alias> command without the --owner argument doesn't include delegations, it only shows self-bonds. To include delegations we'll need to use a prefix iterator query to find them.

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[cwgoes]

@brentstone can you check on this / take this on as part of the PoS work?

[brentstone]

@brentstone can you check on this / take this on as part of the PoS work?

Yeah, I noticed this recently and didn't realize there was an open issue for it. Sounds good.

[brentstone]

Perhaps use a lazy hash set or similar to store all addresses that have delegations to a validator (including self), then querying all delegations becomes much simpler.