Update readme for retirement.

Author: benjaminp

README.rst

@@ -4,8 +4,8 @@ HTTPSWatch
 .. image:: https://travis-ci.org/benjaminp/httpswatch.svg?branch=master
     :target: https://travis-ci.org/benjaminp/httpswatch
 
-This is the `HTTPSWatch project`_, a website that tracks the HTTPS support of
-prominent websites.
+This is the HTTPSWatch project, a retired website that tracks the HTTPS support of
+prominent websites. This project is no longer under development.
 
 The code is fairly simple. Python 3.4 is required. The ``check_https.py`` script
 generates a small static site from JSON data in the ``config/`` directories and
@@ -16,9 +16,3 @@ one line.)
 
 Once ``check_https.py`` has been run, you can run ``testing_server.py`` to view
 the website at ``localhost:8000``.
-
-Project discussions takes place on the Freenode IRC channel #httpswatch. A
-`web client`_ is available.
-
-.. _HTTPSWatch project: https://httpswatch.com
-.. _web client: https://webchat.freenode.net/?channels=%23httpswatch