all: link to https instead of http

The one in misc/makerelease/makerelease.go is particularly bad and
probably warrants rotating our keys.

I didn't update old weekly notes, and reverted some changes involving
test code for now, since we're late in the Go 1.5 freeze. Otherwise,
the rest are all auto-generated changes, and all manually reviewed.

Change-Id: Ia2753576ab5d64826a167d259f48a2f50508792d
Reviewed-on: https://go-review.googlesource.com/12048
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/test/fixedbugs/bug264.go b/test/fixedbugs/bug264.go
index 9d7397c..2f320de 100644
--- a/test/fixedbugs/bug264.go
+++ b/test/fixedbugs/bug264.go
@@ -4,7 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Test case for http://golang.org/issue/692
+// Test case for https://golang.org/issue/692
 
 package main