Populate the candidate set by calling TryAddBlockIndexCandidate on all valid block indices.
Declared in <validation.h>
[[requires_capability(0x7fb95fa38ae8), requires_capability(0x7fb96ac5fa48), requires_capability(0x7fb96e9d6268), requires_capability(0x7fb98748b8d8)]]
void
PopulateBlockIndexCandidates();