rpc: getrpcinfo docs
rpc: getrpcinfo docs

Github-Pull: #15754
Rebased-From: f4b7a2f2055fa52d5e02c37bed7b46599b960e2e

chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin