[Rpm-maint] [rpm-software-management/rpm] Add posix.statvfs to rpmlua (PR #4122)

[Bernhard Rosenkraenzer]

berolinux left a comment (rpm-software-management/rpm#4122)

I don't think there's a transaction check that handles the specific type of move that is going on in the particular context: We're moving /var/lib/mysql to /srv/mysql.
There may be a significant amount of user data in /var/lib/mysql that will not be caught by any of rpm's normal transaction checks because they aren't aware of the %pretrans script that does the directory-to-symlink dance doing the lua equivalent of `mv /var/lib/mysql /srv`.
If `/srv` is a separate partition, it makes sense to check if it has sufficient space before moving the data.
The rpm transaction check would catch it if what is being moved would be solely data included in the package.

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