Controller (and subclasses) failed to enforce $allowed_action restrictions
on parent classes if a child class didn't have it explicitly defined.
Controllers which are extended with $allowed_actions (through an Extension)
now deny access to methods defined on the controller, unless this class also has them in its own
$allowed_actions definition.
Session is not initialized by the time we need to use
the setting in DB::connect(). Cookie values get initialized
automatically for each request.
Tightened name format validation to ensure it can only
be used for temporary databases, rather than switching
the browser session to a different production database.
Encrypting token for secure cookie usage.
Added dev/generatesecuretoken to generate this token.
Not storing in YML config directly because of web access issues.
