So far, placing the code shown in the Docs in an empty config.php works well but will it remain to be configured this way? Little information on this has been published yet.
Thanks for the input - I managed to get it working for me by directly putting the specific code into the config.php so everything worked from the scratch from an initial installation on.
I remembered that the “storage.inc.php” was the way in the past but good to know it still works in v25, too.