lang fixup for master, adds "retired" support

Hello,

I was getting KeyErrors after rebasing to master. I believe it's because
of a typo. The loop variable is used quoted, with kind of looks wrong.

Check it out, and I also submit my support for "retired" posts. Please
find the patch attached.

I am using this to mark posts that were only temporary true, and are no
longer of interest, to not appear anywhere in feeds. It won't give 404
to people who still use it though (comments, links from outside, etc.)

It probably would be nice to autmatically add a remark about that
status. But that's future work.

Yours,
Kay

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From 53cd577e46b0f31af60836973d6aeb2eeaef9b1f Mon Sep 17 00:00:00 2001
From: Kay Hayen <kay.hayen@gmail.com>
Date: Sat, 30 Mar 2013 10:00:46 +0100
Subject: [PATCH] Added support for retired posts