We pretty much already have this exact thing with options 66 (hostname) and 67 (filename) for clients booting via TFTP. Most DoH servers, AIUI, use the same we

We pretty much already have this exact thing with options 66 (hostname) and 67 (filename) for clients booting via TFTP. Most DoH servers, AIUI, use the same well-known path, so we'd simply need two more DHCP options: one for the DoH server's hostname and another for the path. There's no reason something like this couldn't easily be added to the DHCP specification and, at some point, I expect it will... everyone will come together to agree on the details and we'll end up with a new/updated RFC.