rockthedrop - Tue, 2017-02-21 12:42
In the previous versions, you could simply create the necessary directories (site.example.com/settings.php and files/ for instance) in order to get Drupal to look for the proper config and files for the correct multisite currently requested in the browser.
In Drupal 8.2.6, there's a "required" sites.php file that must exist in order for any of this to work. In my opinion (I'm sure someone somewhere has the same opinion), this file should NOT be required... but it is. Let's look at an excerpt: