need to update unless you are installing fresh and want tests to pass.
L<Catalyst::Plugin::Compress> was updated to be compatible with this release.
-You will need to upgrade if you are using this plugin.
+You will need to upgrade if you are using this plugin. L<Catalyst::Upgrading>
+also has details.
A small change is that the configuration setting C<using_frontend_proxy>
was not doing the right thing if you started your application with C<psgi_app>