1. update clientset, deepcopy using code-generator

2. add a dummy file tools.go to force "go mod vendor" to see
code-generator as dependencies
3. add a script to update CRD
4. add a README to document CRD updating steps
run go mod tidy
update README

vendor/github.com/emicklei/go-restful/router.go

@@ -0,0 +1,20 @@
+package restful
+
+// Copyright 2013 Ernest Micklei. All rights reserved.
+// Use of this source code is governed by a license
+// that can be found in the LICENSE file.
+
+import "net/http"
+
+// A RouteSelector finds the best matching Route given the input HTTP Request
+// RouteSelectors can optionally also implement the PathProcessor interface to also calculate the
+// path parameters after the route has been selected.
+type RouteSelector interface {
+
+	// SelectRoute finds a Route given the input HTTP Request and a list of WebServices.
+	// It returns a selected Route and its containing WebService or an error indicating
+	// a problem.
+	SelectRoute(
+		webServices []*WebService,
+		httpRequest *http.Request) (selectedService *WebService, selected *Route, err error)
+}