[PATCH,libstdc++] Adjust link in doc/xml/manual/backwards_compatibility.xml

[Gerald Pfeifer]

There is quite a bit more to fix in the libstdc++ manuals, I'll
try to make some progress the coming weeks.

Applied.

Gerald

2016-05-29  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/xml/manual/backwards_compatibility.xml: Adjust
	lists.debian.org link to https.
	* doc/html/manual/backwards.html: Regenerate.

Index: doc/xml/manual/backwards_compatibility.xml
===================================================================
--- doc/xml/manual/backwards_compatibility.xml	(revision 236857)
+++ doc/xml/manual/backwards_compatibility.xml	(working copy)
@@ -1304,7 +1304,7 @@
   <biblioentry>
       <title>
 	<link xmlns:xlink="http://www.w3.org/1999/xlink"
-	      xlink:href="http://lists.debian.org/debian-gcc/2006/03/msg00405.html">
+	      xlink:href="https://lists.debian.org/debian-gcc/2006/03/msg00405.html">
       Building the Whole Debian Archive with GCC 4.1: A Summary
 	</link>
       </title>