rpc: include peer's remote IP in `/net_info` (#3052)

Refs #3047

CHANGELOG_PENDING.md

@@ -29,6 +29,7 @@ Special thanks to external contributors on this release:
 - [privval] \#1181 Split immutable and mutable parts of priv_validator.json
 
 ### IMPROVEMENTS:
+- [rpc] \#3047 Include peer's remote IP in `/net_info`
 
 ### BUG FIXES:
 - [types] \#2926 do not panic if retrieving the private validator's public key fails

rpc/core/net.go

@@ -53,6 +53,7 @@ func NetInfo() (*ctypes.ResultNetInfo, error) {
 			NodeInfo:         nodeInfo,
 			IsOutbound:       peer.IsOutbound(),
 			ConnectionStatus: peer.Status(),
+			RemoteIP:         peer.RemoteIP(),
 		})
 	}
 	// TODO: Should we include PersistentPeers and Seeds in here?

rpc/core/types/responses.go

@@ -2,6 +2,7 @@ package core_types
 
 import (
 	"encoding/json"
+	"net"
 	"time"
 
 	abci "github.com/tendermint/tendermint/abci/types"
@@ -110,6 +111,7 @@ type Peer struct {
 	NodeInfo         p2p.DefaultNodeInfo  `json:"node_info"`
 	IsOutbound       bool                 `json:"is_outbound"`
 	ConnectionStatus p2p.ConnectionStatus `json:"connection_status"`
+	RemoteIP         net.IP               `json:"remote_ip"`
 }
 
 // Validators for a height