Configd using high CPU

I had an issue similar to the following and solved it, so I thought I'd share the fix here.

Configd and PowerD use high CPU while on Battery

I am running macOS Mojave, Version 10.14. MacBook Pro (Retina, 15-inch, Mid 2014). And had the same issue with Configd staying at 90%+ CPU in Activity monitor. This was with the power cable though.

Basically after a bit of trial an error it was the fact I had internet sharing enabled. I disabled that at it all works again. Hope this helps other people.