Mediawiki upload settings

By default the Mediawiki upload settings are too restrictive because they deny most filetypes. And changing the file extension is not enough because Mediawiki also checks the mime type. As a quick and dirty to allow what you want open LocalSettings.php and add:

$wgStrictFileExtensions = false;
$wgCheckFileExtensions = false;
$wgVerifyMimeType = false;