Empty response bodies for readiness and configured checks.

Update comments and fix up whitespace while we're here.

container/boot.vcl

@@ -5,12 +5,18 @@ include "bogo_backend.vcl";
 sub vcl_recv {
 	if (local.socket == "k8s") {
 		if (req.url == "/ready") {
-			return (synth(200));
+			return (synth(65200));
 		}
-		return (synth(404));
+		return (synth(65404));
 	}
-        if (local.socket == "vk8s_cfg") {
+	if (local.socket == "vk8s_cfg") {
 		return (vcl(vk8s_readiness));
-        }
+	}
 	return (vcl(vk8s_regular));
 }
+
+sub vcl_synth {
+	if (resp.status == 65200 || resp.status == 65404) {
+		return (deliver);
+	}
+}

container/notavailable.vcl

@@ -3,7 +3,13 @@ vcl 4.1;
 include "bogo_backend.vcl";
 
 # Send a synthetic response with status 503 to every request.
-# Used for the readiness check and regular traffic when Varnish is not ready.
+# Used for the configured check and regular traffic when Varnish is
+# not configured to implement an Ingress.
 sub vcl_recv {
-        return(synth(503));
+	return(synth(503));
+}
+
+# Empty response body.
+sub vcl_synth {
+	return (deliver);
 }

container/ready.vcl

@@ -3,7 +3,13 @@ vcl 4.1;
 include "bogo_backend.vcl";
 
 # Send a synthetic response with status 200 to every request.
-# Used for the readiness check when Varnish is ready.
+# Used for the configured check when Varnish is configured to implement
+# an Ingress.
 sub vcl_recv {
-        return(synth(200));
+	return(synth(200));
+}
+
+# Empty response body.
+sub vcl_synth {
+	return (deliver);
 }