Merge pull request #30036 from caesarxuchao/README-to-doc

pkg/util/net/sets/README.md

-This package contains hand-coded set implementations that should be similar to
-the autogenerated ones in `pkg/util/sets`.
-
-We can't simply use net.IPNet as a map-key in Go (because it contains a
-`[]byte`).
-
-We could use the same workaround we use here (a string representation as the
-key) to autogenerate sets.  If we do that, or decide on an alternate approach,
-we should replace the implementations in this package with the autogenerated
-versions.
-
-It is expected that callers will alias this import as `netsets`
-i.e. `import netsets "k8s.io/kubernetes/pkg/util/net/sets"`
-
-
-
-[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/pkg/util/net/sets/README.md?pixel)]()

pkg/util/net/sets/doc.go

+/*
+Copyright 2016 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.
+*/
+
+// This package contains hand-coded set implementations that should be similar
+// to the autogenerated ones in pkg/util/sets.
+// We can't simply use net.IPNet as a map-key in Go (because it contains a
+// []byte).
+// We could use the same workaround we use here (a string representation as the
+// key) to autogenerate sets.  If we do that, or decide on an alternate
+// approach, we should replace the implementations in this package with the
+// autogenerated versions.
+// It is expected that callers will alias this import as "netsets" i.e. import
+// netsets "k8s.io/kubernetes/pkg/util/net/sets"
+
+package sets