The hook is passed no parameters. It returns data about the configuration
options added by the plugin. It can also check if the plugin is usable, and
-die if the plugin is not available, which will cause the plugin to not be
-offered in the configuration interface.
+die if not, which will cause the plugin to not be offered in the configuration
+interface.
The data returned is a list of `%config` options, followed by a hash
describing the option. For example: