Fix broken links

docs/install.rst

@@ -28,4 +28,6 @@ And for full command line help, you can type::
 since ``certbot-auto`` is a wrapper to ``certbot``, it accepts exactly
 the same command line flags and arguments.  More details about this script and
 other installation methods can be found `in the User Guide
-<https://certbot.eff.org/docs/using.html#installation>`_.
+<https://certbot.eff.org/docs/using.html#installation>`_.
+
+.. _certbot.eff.org: https://certbot.eff.org/

docs/resources.rst

@@ -48,3 +48,7 @@ email to client-dev+subscribe@letsencrypt.org)
    https://letsencrypt.readthedocs.org/en/latest/using.html
 
 .. _watch demo video: https://www.youtube.com/watch?v=Gas_sSB-5SU
+
+.. _Freenode: https://webchat.freenode.net?channels=%23letsencrypt
+.. _OFTC: https://webchat.oftc.net?channels=%23certbot
+.. _client-dev: https://groups.google.com/a/letsencrypt.org/forum/#!forum/client-dev