enabling xinetd through systemd

In trying to set up a custom network service under Angstrom, I ran into the fact that xinetd doesn’t automatically start at boot time. Some digging showed that /etc/systemd/system/xinetd.service is just a link to /dev/null.

That’s referred to on this page, apparently in relation to the eMMC:http://www.crashcourse.ca/wiki/index.php/BBB_software_update_process

Unfortunately, all the page says is, “I’ll explain this part at some point:”

I assume there’s some kind of conflict that’s difficult to resolve by other means.

That leads to a question though: is it possible to enable xinetd at boot through the systemd interface, or do I need to do it some other way?