These have been:
- taken from x86_64 server iso (in substituted form);
- checked against m-p-d where needed;
- renamed from centaurus-* to centaurus/*;
- updated with s/samba-server/samba/;
- archdep bits adjusted for m-p-d/m-p syntax difference;
- amended with some tester feedback based additions included;
- pruned regarding p9/branch packages availability.

It's small but useful enough to justify installation by default.

Make it prefix not suffix so that sorting order
in alterator-pkg is natural instead of chaotic
during installation; turn some implicit "tools"
into explicit ones for consistency either.

...along with obituary fixes.