message: Add logpath description for getrpcinfo
diff: @@ -210,7 +210,8 @@ static UniValue getrpcinfo(const JSONRPCRequest& request)
  " \"method\" (string) The name of the RPC command \n"
  " \"duration\" (numeric) The running time in microseconds\n"
  " },...\n"
  - " ]\n"
  + " ],\n"
  + " \"logpath\": \"xxx\" (string) The complete file path to the debug log\n"
  "}\n"
  },
  RPCExamples{
  