Add some relevant <link> elements.
diff --git a/Doc/html/about.html b/Doc/html/about.html
index 8d276c0..e9c0541 100644
--- a/Doc/html/about.html
+++ b/Doc/html/about.html
@@ -5,6 +5,8 @@
<meta name="description"
content="Overview information about the Python documentation">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+ <link rel="contents" href="index.html" title="Python Documentation Index">
+ <link rel="index" href="modindex.html" title="Global Module Index">
<link rel="SHORTCUT ICON" href="icons/pyfav.gif" type="image/gif">
<link rel="STYLESHEET" href="lib/lib.css">
</head>