avahi-autipd?
 

I saw in my logwatch that a user avahi-autoipd(100) was created. I didn't create this but my server did have a rebuild yesterday.

Of course I deleted it thinking it was a security risk as why would the logwatch show a user being added?
Should I readd it back in? It was avahi-autoipd(100) but I'm not sure about the group. How can I add back in to include the UID?