start rewriting ASIO-related network service implementation

tests/adc_netservice_test.cpp

@@ -18,7 +18,9 @@ int main()
     };
 
     // srv.asyncAccept(ept_s, srv_ctx, std::chrono::seconds(120));
-    srv.asyncConnect(ept_c, srv_ctx);
+    srv.asyncConnect(ept_c, [](std::error_code ec) {
+
+    });
 
     ctx.run();