Currently the `getnetworkinfo` returns something like: 

```
"localservices": "0000000000000449",
```

Manually parsing this consistently gives me a headache (see also https://github.com/sipa/bitcoin-seeder/pull/77).

It would be useful to parse this and show the right combination of `NODE_NETWORK`, `NODE_GETUTXO`, `NODE_BLOOM`, `NODE_WITNESS`, `NODE_NETWORK_LIMITED` and `NODE_COMPACT_FILTERS`. In addition the help text for `getnetworkinfo` could be expanded to mention the right BIP numbers for known flags.

There is some ad hoc parsing to populate e.g. `localrelay`, etc (?).  Their help text could also refer back to `NODE_GETUTXO`.

See also: https://en.bitcoin.it/wiki/Protocol_documentation#Network_address
NodeId nodeid = (NodeId) id_arg.get_int64();
        success = g_connman->DisconnectNode(nodeid);
    } else {
        throw JSONRPCError(RPC_INVALID_PARAMS, "Only one of address and nodeid should be provided.");
    }
    if (!success) {
        throw JSONRPCError(RPC_CLIENT_NODE_NOT_CONNECTED, "Node not found in connected nodes");
    }
    return NullUniValue;
}
static UniValue getaddednodeinfo(const JSONRPCRequest& request)
{
            RPCHelpMan{"getaddednodeinfo",
                "\nReturns information about the given added node, or all added nodes\n"
                "(note that onetry addnodes are not listed here)\n",
                {
                    {"node", RPCArg::Type::STR,  "all nodes", "If provided, return information about this specific node, otherwise all nodes are returned."},
                },
                RPCResult{
            "[\n"
            "  {\n"
            "    \"addednode\" : \"192.168.0.201\",   (string) The node IP address or name (as provided to addnode)\n"
            "    \"connected\" : true|false,          (boolean) If connected\n"
            "    \"addresses\" : [                    (list of objects) Only when connected = true\n"
            "       {\n"
            "         \"address\" : \"192.168.0.201:8333\",  (string) The bitcoin server IP and port we're connected to\n"
            "         \"connected\" : \"outbound\"           (string) connection, inbound or outbound\n"
            "       }\n"
            "     ]\n"
            "  }\n"