So, if we're called by another entrypoint than index.php, we should also construct an instance of the Service class.

We could also create a directory with rules like this.

That would allow to use autodiscovery listing this directory.

Each rule would be a class extending BaseCommonSetting.

Exception class to prepare.

I've registered wolfplex.org back.

Perhaps .org is a better canonical?

ToMapSettings?

agora too is a /$1

That's important to set even when the uploads are disabled, e.g. if a wiki wants to do stuff like TeX maths.

We should triple check all wikis are CC-BY.

Set wgInstantCommons at true, it's used on every wiki I think.

This part should be moved to a service.php, so it can be require_once when needed, here (entry point is index.php) or in LocalSettings.php (other entry points).

Exception class to prepare

To prepare.

Override isExisting:

try
    Instances::getDatabaseFromHost($this->host)
    return true
catch InstanceNotFoundException
    return false