controller_admin_config
Shows the admin config editor. Here you can edit the key/value pairs of model#config.
The controller is available through the admin_config dispatch rule and
requires permission to use mod_admin_config. It renders admin_config.tpl
with all editable configuration entries, grouped by module and sorted.
Only simple value entries are shown. Configuration records with additional structured properties are deliberately filtered out, preventing the generic editor from overwriting settings managed by a specialized interface. The page is not cached or indexed.