Suggestion to the author: I could really benefit from a short sentence that explains to me what DV means. I get from the context that EV likely means "Extended Validation". Then again, all I ever did was set up SSL on Heroku and a bit of openssl magic to get Github running - so maybe not the target for the article?

Edit for clarification: There is a short description of DV & EV, but it doesn't mention what DV/EV stands for. I'd love to know that (without Googling, because lazy).