/var/lib/pgcluu/data world-readable by default!

root@osiris:/var/lib/pgcluu# ls -l
total 4
drwxr-xr-x 3 postgres postgres 4096 mars  18 16:24 data

I don't think that this is a good idea. There is sensitive stuff there, like the schema or pg_hba.conf.

I would make it 700 by default.