Merge pull request #4245 from thaJeztah/remove_deprecated_dualstack

ConfigureHosts: remove deprecated DualStack option

remotes/docker/config/hosts.go

@@ -108,9 +108,9 @@ func ConfigureHosts(ctx context.Context, options HostOptions) docker.RegistryHos
 		defaultTransport := &http.Transport{
 			Proxy: http.ProxyFromEnvironment,
 			DialContext: (&net.Dialer{
-				Timeout:   30 * time.Second,
-				KeepAlive: 30 * time.Second,
-				DualStack: true,
+				Timeout:       30 * time.Second,
+				KeepAlive:     30 * time.Second,
+				FallbackDelay: 300 * time.Millisecond,
 			}).DialContext,
 			MaxIdleConns:          10,
 			IdleConnTimeout:       30 * time.Second,