doc: drop scheme from links that are known to support HTTPS
golang.org now serves HTTPS with a valid cert, so it's reasonable
that users should click through to the HTTPS versions of *.golang.org
and other known sites.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/112650043
diff --git a/doc/go1compat.html b/doc/go1compat.html
index 7ca3d35..d10b9af 100644
--- a/doc/go1compat.html
+++ b/doc/go1compat.html
@@ -145,7 +145,7 @@
<p>
Code in sub-repositories of the main go tree, such as
-<a href="http://code.google.com/p/go.net">code.google.com/p/go.net</a>,
+<a href="//code.google.com/p/go.net">code.google.com/p/go.net</a>,
may be developed under
looser compatibility requirements. However, the sub-repositories
will be tagged as appropriate to identify versions that are compatible
