Method curl_multi_exception

include/curl_exception.h:176–177

* This constructor enables setting a custom error message and the method name where * the exception has been thrown. */

         * the exception has been thrown.
         */
        curl_multi_exception(const std::string &error, const std::string &method) :
                curl_exception(error,method), code(CURLM_OK) {}
        /**
         * The constructor will transform a CURLMcode error to a proper error message.
         */