|Toggle whether users may upload files not covered by
|其他设置： 按首字母排序 | 按功能排序|
If set to false, users will be able to upload files with almost any extension.
A user attempting to upload a file whose extension is not in
$wgFileExtensions will receive a warning message.
However, they may choose to ignore the message and upload the file anyway (assuming the file's extension is not in the