The `NodeInfo` interface does not appear to serve any purpose at all, so I removed it and renamed the `DefaultNodeInfo` struct to `NodeInfo` (including the Protobuf representations). Let me know if this is actually needed for anything.
Only the Protobuf rename is listed in the changelog, since we do not officially support API stability of the `p2p` package (according to `README.md`). The on-wire protocol remains compatible.
* p2p: NodeInfo is an interface
* (squash) fixes from review
* (squash) more fixes from review
* p2p: remove peerConn.HandshakeTimeout
* p2p: NodeInfo is two interfaces. Remove String()
* fixes from review
* remove test code from peer.RemoteIP()
* p2p: remove peer.OriginalAddr(). See #2618
* use a mockPeer in peer_set_test.go
* p2p: fix testNodeInfo naming
* p2p: remove unused var
* remove testRandNodeInfo
* fix linter
* fix retry dialing self
* fix rpc