- added correct group for tftp
(bnc#738905)

- Use systemd macros correctly
- build with PIE and full RELRO.

- --enable-dbus must be explicit in systemd unit
- default user is provided in config file or takes defaults on
group_and_isc.diff

- dnsmasq has dbus support, use it for systemd service.

- removed systemd config for pre-12.1

- Must be of type forking and change uid to dnsmasq

- Add systemd startup script