access plugins allow context based access control to pages. 'title' => Title of the plugin 'description' => Description of the plugin 'callback' => callback to see if there is access is available. params: $conf, $contexts, $account 'required context' => zero or more required contexts for this access plugin 'default' => an array of defaults or a callback giving defaults 'settings form' => settings form. params: &$form, &$form_state, $conf settings form validate settings form submit warning: Your settings array will be stored IN THE MENU SYSTEM to reduce loads, so be TRIM.