config: Update remote URL handling.

luci_config/server/cfgclient/backend/client/client_test.go

Index: luci_config/server/cfgclient/backend/client/client_test.go
diff --git a/luci_config/server/cfgclient/backend/client/client_test.go b/luci_config/server/cfgclient/backend/client/client_test.go
index 241f258d7ada886a2297d28b6d830c4b0e44c715..08913ca1f4390cfb680f5d65e3f9f52d385a7d42 100644
--- a/luci_config/server/cfgclient/backend/client/client_test.go
+++ b/luci_config/server/cfgclient/backend/client/client_test.go
@@ -60,9 +60,15 @@ func TestRemoteService(t *testing.T) {
 		svr := httptest.NewServer(&ris)
 		defer svr.Close()
 
+		svrURL, err := url.Parse(svr.URL)
+		if err != nil {
+			panic(err)
+		}
+
 		c = backend.WithBackend(c, &Backend{
 			Provider: &RemoteProvider{
-				BaseURL:                 svr.URL,
+				Host:                    svrURL.Host,
+				Insecure:                true,
 				testUserDelegationToken: "user token",
 			},
 		})