Cleanup non-rest apiserver handlers

- rename MuxHelper -> PathRecorderMux
- move non-rest handlers into routes packages within genericapiserver and
  `pkg/routes` (those from master)
- move ui and logs handlers out of genericapiserver (they are
  not generic)
- make version handler configurable (`config.EnableVersion`)

pkg/routes/ui.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package routes
+
+import (
+	"net/http"
+
+	"github.com/emicklei/go-restful"
+
+	"k8s.io/kubernetes/pkg/apiserver"
+)
+
+const dashboardPath = "/api/v1/proxy/namespaces/kube-system/services/kubernetes-dashboard"
+
+// UIRediect redirects /ui to the kube-ui proxy path.
+type UIRedirect struct{}
+
+func (r UIRedirect) Install(mux *apiserver.PathRecorderMux, c *restful.Container) {
+	mux.HandleFunc("/ui/", func(w http.ResponseWriter, r *http.Request) {
+		http.Redirect(w, r, dashboardPath, http.StatusTemporaryRedirect)
+	})
+}