Change gae to apache 2 license.

filter/dscache/globalconfig.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 dscache
 
 import (
         "sync"
         "time"
 
         "github.com/luci/gae/service/datastore"
         "github.com/luci/gae/service/info"
         "github.com/luci/gae/service/memcache"
@@ skipping 95 matching lines @@
                 cfg.Enable = memcacheEnabled
                 if memcacheEnabled {
                         // when going false -> true, wipe memcache.
                         if err := memcache.Get(c).Flush(); err != nil {
                                 return err
                         }
                 }
                 return ds.Put(cfg)
         }, nil)
 }