Merge pull request #100376 from liggitt/http2-1.18

Cherrypick #95981 to 1.18, Enables HTTP/2 health check

Kubernetes-commit: e680574e6e218b29fca89aac9d83ad82341c8ac4

Godeps/Godeps.json

@@ -280,7 +280,7 @@
 		},
 		{
 			"ImportPath": "golang.org/x/net",
-			"Rev": "13f9640d40b9"
+			"Rev": "69a78807bb2b"
 		},
 		{
 			"ImportPath": "golang.org/x/oauth2",
@@ -292,7 +292,7 @@
 		},
 		{
 			"ImportPath": "golang.org/x/sys",
-			"Rev": "fde4db37ae7a"
+			"Rev": "5cba982894dd"
 		},
 		{
 			"ImportPath": "golang.org/x/text",
@@ -352,19 +352,19 @@
 		},
 		{
 			"ImportPath": "k8s.io/api",
-			"Rev": "4352ece35dc9"
+			"Rev": "828bab7a24bb"
 		},
 		{
 			"ImportPath": "k8s.io/apimachinery",
-			"Rev": "1a4218b8b919"
+			"Rev": "c68ad1a85ac1"
 		},
 		{
 			"ImportPath": "k8s.io/client-go",
-			"Rev": "82b9b1a14664"
+			"Rev": "b994da18bceb"
 		},
 		{
 			"ImportPath": "k8s.io/code-generator",
-			"Rev": "f186a36abf5c"
+			"Rev": "a1aab0144d81"
 		},
 		{
 			"ImportPath": "k8s.io/gengo",