Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/golang.org/x/tools/cmd/tip/cert.go

@@ -0,0 +1,63 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+// +build autocert
+
+// This file contains autocert and cloud.google.com/go/storage
+// dependencies we want to hide by default from the Go build system,
+// which currently doesn't know how to fetch non-golang.org/x/*
+// dependencies. The Dockerfile builds the production binary
+// with this code using --tags=autocert.
+
+package main
+
+import (
+	"context"
+	"crypto/tls"
+	"log"
+	"net/http"
+
+	"cloud.google.com/go/storage"
+	"golang.org/x/build/autocertcache"
+	"golang.org/x/crypto/acme/autocert"
+)
+
+func init() {
+	runHTTPS = runHTTPSAutocert
+	certInit = certInitAutocert
+	wrapHTTPMux = wrapHTTPMuxAutocert
+}
+
+var autocertManager *autocert.Manager
+
+func certInitAutocert() {
+	var cache autocert.Cache
+	if b := *autoCertCacheBucket; b != "" {
+		sc, err := storage.NewClient(context.Background())
+		if err != nil {
+			log.Fatalf("storage.NewClient: %v", err)
+		}
+		cache = autocertcache.NewGoogleCloudStorageCache(sc, b)
+	}
+	autocertManager = &autocert.Manager{
+		Prompt:     autocert.AcceptTOS,
+		HostPolicy: autocert.HostWhitelist(*autoCertDomain),
+		Cache:      cache,
+	}
+}
+
+func runHTTPSAutocert(h http.Handler) error {
+	s := &http.Server{
+		Addr:    ":https",
+		Handler: h,
+		TLSConfig: &tls.Config{
+			GetCertificate: autocertManager.GetCertificate,
+		},
+	}
+	return s.ListenAndServeTLS("", "")
+}
+
+func wrapHTTPMuxAutocert(h http.Handler) http.Handler {
+	return autocertManager.HTTPHandler(h)
+}