Thanks for your contribution.
As you can see on
https://twisted.reviews, we're definitely a little backlogged on reviewer bandwidth :). One way you might accelerate these reviews is by doing one for a different ticket, so that when someone has availability, fewer tickets are in the queue waiting for their attention. Personally I can say that I'll have a look at this when my own availability permits (I'll try to get to it when I next do a review, but I'm not sure when that will be), and I will trust that your familiarity with DNS is sufficient if there are any concerns I have about the branch.