Function usage

lib_acl_cpp/samples/benchmark/client2/main.cpp:59–65

}

static void usage(const char* procname)
{
	printf("usage: %s -h [help]\r\n"
		"\t-s server_addr[127.0.0.1:8888]\r\n"
		"\t-n max_loop[10]\r\n"
		"\t-l package_length[1024]\r\n", procname);
}

int main(int argc, char* argv[])
{