all: update license headers for consistency

There were a few files with different wording in the license header
than is present in the rest of the repository. Update these to say
“BSD-style” instead of “Apache 2.0”.

Change-Id: I24df0e69fbd18728dcf1aec8166c5a52407930f6
Reviewed-on: https://go-review.googlesource.com/c/website/+/231159
Reviewed-by: Alexander Rakoczy <alex@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/cmd/golangorg/godoc_test.go b/cmd/golangorg/godoc_test.go
index 7a17b34..f453dd6 100644
--- a/cmd/golangorg/godoc_test.go
+++ b/cmd/golangorg/godoc_test.go
@@ -1,4 +1,4 @@
-// Copyright 2013 The Go Authors.  All rights reserved.
+// Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
diff --git a/internal/dl/dl.go b/internal/dl/dl.go
index 9d83300..10d8b20 100644
--- a/internal/dl/dl.go
+++ b/internal/dl/dl.go
@@ -1,5 +1,5 @@
 // Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // Package dl implements a simple downloads frontend server.
diff --git a/internal/dl/dl_test.go b/internal/dl/dl_test.go
index 9ea5f62..8f55a0f 100644
--- a/internal/dl/dl_test.go
+++ b/internal/dl/dl_test.go
@@ -1,5 +1,5 @@
 // Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package dl
diff --git a/internal/dl/server.go b/internal/dl/server.go
index 5fbbf98..4ce0f6e 100644
--- a/internal/dl/server.go
+++ b/internal/dl/server.go
@@ -1,5 +1,5 @@
 // Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // +build golangorg
diff --git a/internal/dl/tmpl.go b/internal/dl/tmpl.go
index 2f6eef6..9d6fb57 100644
--- a/internal/dl/tmpl.go
+++ b/internal/dl/tmpl.go
@@ -1,5 +1,5 @@
 // Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package dl
diff --git a/internal/short/short.go b/internal/short/short.go
index 0b81ef7..5410a22 100644
--- a/internal/short/short.go
+++ b/internal/short/short.go
@@ -1,5 +1,5 @@
 // Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // +build golangorg
diff --git a/internal/short/short_test.go b/internal/short/short_test.go
index 5ae4443..f50ece9 100644
--- a/internal/short/short_test.go
+++ b/internal/short/short_test.go
@@ -1,5 +1,5 @@
 // Copyright 2020 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // +build golangorg
diff --git a/internal/short/tmpl.go b/internal/short/tmpl.go
index 66f5401..c6b6d7f 100644
--- a/internal/short/tmpl.go
+++ b/internal/short/tmpl.go
@@ -1,5 +1,5 @@
 // Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by the Apache 2.0
+// Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package short