Oops, sorry for not replying to this earlier.
"Core policy" means at SELinux? Why not put it in a contrib directory
in MM3, too? Why not now?
Yes, it means at SELinux. It's apparently the preferred way to host policies, a bit like the linux kernel is the preferred place to host drivers. In case of interface changes, they can update all the modules. In the meantime, I can surely place my policy files in a contrib subdir in MM3 too. They are tailored to the destination directories we use in Fedora, but I welcome contributions :-) Merge request incoming...