Function async_wget_with_retry

src/async_handler.cpp:128–137

	}

	void async_wget_with_retry(
		std::string url,
		std::string file,
		std::string param,
		FileRequestAsync* obj
	) {
		// ctx will be deleted when download succeeds
		auto ctx = new async_download_context{ url, file, param, obj };
		start_async_wget_with_retry(ctx);
	}

#endif
}