systemd tftp xinetd

[Ken Teh]

I need help with how to enable tftp service. I am trying to get something done 
and I have no patience for systemd's convoluted logic.

The tftp-server installs
(1) /etc/xinetd.d/tftp

(2) tftp.socket  (what's this?)

(3) tftp.service

Manually, I can start the service and everything works. But enabling the service 
stays disabled or indirect. Enabling the socket does not start the service on 
reboot. Do I need xinetd or does systemd deprecate xinetd?

Geez!  I miss the old days when Unix was simple.