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>

src/reflect/type.go

@@ -12,7 +12,7 @@
 // for that type.
 //
 // See "The Laws of Reflection" for an introduction to reflection in Go:
-// http://golang.org/doc/articles/laws_of_reflection.html
+// https://golang.org/doc/articles/laws_of_reflection.html
 package reflect
 
 import (
@@ -389,7 +389,7 @@ type Method struct {
 	// method name.  It is empty for upper case (exported) method names.
 	// The combination of PkgPath and Name uniquely identifies a method
 	// in a method set.
-	// See http://golang.org/ref/spec#Uniqueness_of_identifiers
+	// See https://golang.org/ref/spec#Uniqueness_of_identifiers
 	Name    string
 	PkgPath string
 
@@ -737,7 +737,7 @@ type StructField struct {
 	// Name is the field name.
 	// PkgPath is the package path that qualifies a lower case (unexported)
 	// field name.  It is empty for upper case (exported) field names.
-	// See http://golang.org/ref/spec#Uniqueness_of_identifiers
+	// See https://golang.org/ref/spec#Uniqueness_of_identifiers
 	Name    string
 	PkgPath string
 
@@ -1188,7 +1188,7 @@ func implements(T, V *rtype) bool {
 
 // directlyAssignable reports whether a value x of type V can be directly
 // assigned (using memmove) to a value of type T.
-// http://golang.org/doc/go_spec.html#Assignability
+// https://golang.org/doc/go_spec.html#Assignability
 // Ignoring the interface rules (implemented elsewhere)
 // and the ideal constant rules (no ideal constants at run time).
 func directlyAssignable(T, V *rtype) bool {