* network-devp2p: Test for discovery bucket insertion.
All test values are randomly generated and the assertions are checked manually.
Test fails because distance metric is implemented incorrectly.
* network-devp2p: Fix discovery distance function.
The Kademlia distance function (XOR) was implemented incorrectly as a population count.
* network-devp2p: Refactor nearest_node_entries to be on instance.
Optimizations are possible with more access to the discovery state.
* network-devp2p: Fix loss of precision in nearest_node_entries.
* network-devp2p: More efficient nearest node search.
The discovery algorithm to identify the nearest k nodes does not need to scan
all entries in all buckets.
485d4aa8f3