Support TLS remote test daemon

This will allow us to have a windows-to-linux CI, where the linux host
can be anywhere, connecting with TLS.

Signed-off-by: Tibor Vass <tibor@docker.com>
Upstream-commit: f4a1e3db998816e5fcb0df56c29519c488890464
Component: engine

components/engine/integration-cli/docker_cli_stats_test.go

@@ -127,7 +127,7 @@ func (s *DockerSuite) TestStatsAllNewContainersAdded(c *check.C) {
 	id <- strings.TrimSpace(out)[:12]
 
 	select {
-	case <-time.After(5 * time.Second):
+	case <-time.After(10 * time.Second):
 		c.Fatal("failed to observe new container created added to stats")
 	case <-addedChan:
 		// ignore, done