California unveils online tool for vaccine verification

At first pass, this seems to be using the same `shc:/` system that is being used in Quebec. This was discussed here: https://news.ycombinator.com/item?id=27354815

I have no idea if this is a good idea or not. I think we'll probably end up fighting about this for a year and then it won't matter anymore. But, the nerd in me is very excited to get a QR code with a JWT with my vaccination records.