Comment 16 for bug 314220

However, the command "file -bi" on Redhat or Linux, does return application/x-zip for those openoffice files.
So, there should be an option for sysadmin to put additional custom mime.types entries.

Letting sysadmin to edit the file "includes/mime.types" is not a good idea,
since it will decrease the maintainability, especially when upgrading the MediaWiki software.
The custom mime.types entries should be placed in a separate file. The file name may be specified in a variable, $wgCustomMimeTypes, for example.