fix static checks

pkg/proxy/util/network.go

 /*
-Copyright 2017 The Kubernetes Authors.
+Copyright 2018 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.

pkg/proxy/util/testing/fake.go

 /*
-Copyright 2015 The Kubernetes Authors.
+Copyright 2018 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.
@@ -25,6 +25,7 @@ type FakeNetwork struct {
 	Address map[string][]net.Addr
 }
 
+// NewFakeNetwork initializes a FakeNetwork.
 func NewFakeNetwork() *FakeNetwork {
 	return &FakeNetwork{
 		NetworkInterfaces: make([]net.Interface, 0),