Even if you use mysql you still need sqlite3 for fulltext search (sqlitefts)
If you are running php-fpm as a systemd service, you could set UMask for the service.
The last parameter wins. In the above example the object with id=2 is selected.
It's on my agenda for a long time. So, I guess it's about time to do it.
If you need to migrate all data from one seeddms installation to another then just copy the data folder and dump/import the database.
Do you really need this tools? Which database are you using? Are you planing to change it?
6.0.39 already includes the changes.
I once started an extension called 'internal link' which is similar to a symlink in a file system. It was never finished because of lots of small problems, like access rights, notifications, etc.