Comment # 1 on bug 982302 from Thorsten Kukuk

(In reply to Gerald Pfeifer from comment #0)
> When installing or upgrading even the mariadb-client package, I noticed
> there is a warning (which I think we should avoid):

That's no warning, that's an informational message. And you get this, because
you installed this package new and didn't made an update.
Removing this would mean, that mariadb will stop working if you update from an
older version. It's needed to adjust the passwd entry for mariadb to adjust
with the package changes.