We have just released Certbot 0.9.3. This is a very small bug fix
release that one includes the following two patches:
* Adopt more conservative behavior about reporting a needed port as
unavailable when using the standalone plugin.
* The Apache plugin uses information about your OS to help determine the
layout of your Apache configuration directory. We added a patch to
ensure this code behaves the same way when testing on different systems
as the tests were failing in some cases.