Function usage

lib_acl_cpp/samples/benchmark/server/main.cpp:99–104

}

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-p [separate read/write in two thread]\r\n", procname);
}

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