rpc: dont log an error if user configures --rpcapi=rpc...#20776

fjl merged 2 commits into

ethereum:masterethereum/go-ethereum:masterfrom

etclabscore:fix/rpc-as-rpcapi-error-logetclabscore/ethereum.go-ethereum:fix/rpc-as-rpcapi-error-logCopy head branch name to clipboard