SophronMimeTypeMapFactory should just override MimeTypeMapFactory::doCreateMap()

Good point, thanks @kim.pepper

I think we should add a test to check if DummyMimeTypeMapLoadedSubscriber has an effect on the mapping. The legacy hook was already not processed by Sophron, but now that we have methods we should be able to process the event. This event will trigger 'core' changes, while the Sophron's initializeMap will be specific to Sophron.

In essence, the sequence should be:
a) the Sophron map is initialized in the Drupal\sophron\MimeMapManagerInterface service, initializeMap event is triggered and will process map changes according to fileeye/mimemap primitives;
b) core triggers the MimeTypeMapLoadedEvent event in MimeTypeMapFactory and will process map changes according to MimeTypeMap primitives (that are proxies to the fileeye/mimemap ones via Sophron's MimeMapManager.

A bit complicated but this would allow keeping Sophron as a separate MIME type mapping service not used for guessing purposes.

Automatically closed - issue fixed for 2 weeks with no activity.