libp2p-kad 0.42.1

Kademlia protocol for libp2p
Documentation
Implementation of the libp2p-specific [Kademlia](https://github.com/libp2p/specs/blob/master/kad-dht/README.md) protocol. # Important Discrepancies - **Peer Discovery with Identify** In other libp2p implementations, the [Identify](https://github.com/libp2p/specs/tree/master/identify) protocol might be seen as a core protocol. Rust-libp2p tries to stay as generic as possible, and does not make this assumption. This means that the Identify protocol must be manually hooked up to Kademlia through calls to [`Kademlia::add_address`]. If you choose not to use the Identify protocol, and do not provide an alternative peer discovery mechanism, a Kademlia node will not discover nodes beyond the network's [boot nodes](https://docs.libp2p.io/concepts/glossary/#boot-node). Without the Identify protocol, existing nodes in the kademlia network cannot obtain the listen addresses of nodes querying them, and thus will not be able to add them to their routing table.