Returns an object containing various state info regarding P2P networking.
curl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"getnetworkinfo","params":[]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/{
"version": 270000,
"subversion": "/Satoshi:27.0.0/",
"protocolversion": 70016,
"connections": 125,
"connections_in": 15,
"connections_out": 10,
"relayfee": 0.00001000
}