docs: update startup of tftp services
[sms](*\#*) systemctl enable httpd.service
[sms](*\#*) systemctl restart httpd
[sms](*\#*) systemctl enable dhcpd.service
-[sms](*\#*) systemctl enable tftp
-[sms](*\#*) systemctl restart tftp
+[sms](*\#*) systemctl enable tftp.socket
+[sms](*\#*) systemctl start tftp.socket
\end{lstlisting}
%\end{verbatim}
% end_ohpc_run
