getpeerinfo returns a poorly-formatted JSON response in v2.

[NotoriousPyro]

Similarly to #225, #226 and #234

getpeerinfo returns an object, result, containing an object, peers, which is an array:
curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"getpeerinfo","params":[],"id":1}' http://127.0.0.1:8820/rpc/v2

{
        "id" : 1,
        "jsonrpc" : "2.0",
        "result" :
        {
                "peers" :
                [
                        "119.28.152.222:5251",
                        "47.88.76.112:5251",
                        "172.31.12.151:39154",
                        "172.31.12.151:5251",
                        "49.51.37.251:5251",
                        "138.68.15.134:5251",
                        "123.57.138.110:5251",
                        "49.51.40.205:5251",
                        "138.197.155.16:5251",
                        "49.51.40.128:5251"
                ]
        }
}

It would be easier to interface with the API with less chance of breakage if result was an array in this instance instead:

{
        "id" : 1,
        "jsonrpc" : "2.0",
        "result" :
        [
                "119.28.152.222:5251",
                "47.88.76.112:5251",
                "172.31.12.151:39154",
                "172.31.12.151:5251",
                "49.51.37.251:5251",
                "138.68.15.134:5251",
                "123.57.138.110:5251",
                "49.51.40.205:5251",
                "138.197.155.16:5251",
                "49.51.40.128:5251"
        ]
}

[luozhaohui]

Fixed in APIv3 getpeerinfo