rm#122543

The "Administration tools" group contains software
that has a graphical interface.
The "Samba-DC Server" profile does not include a GUI,
this software will not work.

Made at the request of Anton Abramov <abramovav@basealt.ru>

Remove packages from "Samba-DC Server" group and use
"Administration tools" and "Group policy templates" groups,
which contain a similar set of packages.

Add "DNS server" group
Remove "DHCP server", "Mail Server", "Network installation server",
"FreeNX Server", "Sogo groupware server", "Xorg" groups
Change NetworkManager to Systemd-networkd

Made at the request of Anton Abramov <abramovav@basealt.ru>

Network interface management system:
- NetworkManager daemon by default
- Systemd network configuration daemon

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.