on object)
    "addednode" : "str",         (string) The node IP address or name (as provided to addnode)
    "connected" : true|false,    (boolean) If connected
    "addresses" : [              (json array) Only when connected = true
      {                          (json object)
        "address" : "str",       (string) The bitcoin server IP and port we're connected to
        "connected" : "str"      (string) connection, inbound or outbound
      },
      ...
    ]
  },
  ...
]

Examples:
> bitcoin-cli g