This just adds noise and cruft to desktop files and spec files. It is not used by anything.
Likewise --vendor fedora, but current desktop-file-install requires a vendor even though it isn't in use. We'll be fixing that shortly though.
So for now, can I get votes to remove the --add-category X-Fedora line from the guidelines?
For the --vendor thing, it should probably stay in for now for older releases since I don't want to see our guidelines get too broken up between what is allowed or disallowed per release.
packaging@lists.fedoraproject.org