message: [rpc] Improve error on method not found
diff: @@ -607,7 +607,11 @@ UniValue CRPCTable::execute(const std::string &strMethod, const UniValue &prepar
  // Find method
  const CRPCCommand *pcmd = tableRPC[strMethod];
  if (!pcmd)
  - throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found");
  + {
  + std::stringstream ss;
  + ss << "Method '" << strMethod << "' not found";
  + throw JSONRPCError(RPC_METHOD_NOT_FOUND, ss.str());
  + }
  g_rpcSignals.PreCommand(*pcmd);
  