There are some config values that haven't found their way into the administration page.
This has several reasons.
Maybe they are part of a current development that isn't considered stable and will be added later in the administration page when it is considered safe.
-Or it triggers something that isn't expected to be of public interest. Or it is for testing purposes only.
+Or it triggers something that isn't expected to be of public interest.
+Or it is for testing purposes only.
**Attention:** Please be warned that you shouldn't use one of these values without the knowledge what it could trigger.
Especially don't do that with undocumented values.
* **upgrade_link** -
-## experimentals ##
+## experimental ##
* **exp_themes** (Boolean) - Show experimental themes as well.