message: Add exception what to the thrown connection exception
diff: @@ -49,8 +49,11 @@ namespace eosio { namespace client { namespace http {
  if( endpoint_iterator != end ) {
  continue;
  } else {
  - FC_THROW_EXCEPTION(connection_exception, "Connection to ${server}:${port}${path} is refused",
  - ("server", server)("port", port)("path", path));
  + throw connection_exception(fc::log_messages{
  + FC_LOG_MESSAGE( error, "Connection to ${server}:${port}${path} is refused",
  + ("server", server)("port", port)("path", path) ),
  + FC_LOG_MESSAGE( error, e.what())
  + });
  }
  }
  