read: include IP in JSON output

This is already the case for CSV and TSV.

lib/cmd_read.go

@@ -111,6 +111,11 @@ func CmdRead(f CmdReadFlags, args []string, printHelp func()) error {
 			}
 			continue
 		}
+
+		if f.Format == "json-compact" || f.Format == "json-pretty" {
+			record["ip"] = ip
+		}
+
 		recordStr := mapInterfaceToStr(record)
 
 		if !hdrWritten {