I'm using MediaWiki 1.23.10 with a BlueSpice extension and tried to add a file extension which would be allowed for a file upload (namely a .dwg file). Reading the documentation I thought that I find a complete list of allowed files under $wgFileExtensions in the LocalSettings.php, but no.
Then I thought perhaps this could be done directly on the Special:Upload page but on this page there is no VisualEditor present.
Anybody have any ideas how to accomplish this? Many thanks for your help!