Function usage

lib_rpc/samples/http_rpc_server/http_rpc_server.cpp:95–100

}

static void usage(const char* procname)
{
	printf("usage: %s -h [help]\r\n"
		"-s listen_addr [127.0.0.1:8888]\r\n"
		"-m [use_mempool, default: false]\r\n", procname);
}

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