Umount of /dev/fuse integration in urbackupsrv remove-unknown

Maybe I’m doing something wrong but I work now 3 days on 5 Server with many Clients to get all setup and find the best settings.

During testing there a lot of mounts, deletes, urbackupsrv remove-unknown, etc …

I think it would be greate when running urbackupsrv remove-unknown it should automatic unmount all /dev/fuse .