Change gae to apache 2 license.

impl/memory/user.go

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
+// Copyright 2015 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
 
 package memory
 
 import (
         "crypto/sha256"
         "encoding/binary"
         "fmt"
         "net/mail"
         "net/url"
         "strings"
@@ skipping 99 matching lines @@
                 Admin:      admin,
 
                 ID:       fmt.Sprint(binary.LittleEndian.Uint64(id[:])),
                 ClientID: clientID,
         })
 }
 
 func (u *userImpl) Logout() {
         u.SetUser(nil)
 }