Characterise current use of TLS 0-RTT in Encrypted DNS Deployments

The project is to check what (various) browsers and/or other DNS stubs/recursives and public recursives (e.g. quad-1,8,9) support and use in terms of TLS 0-RTT when DoT/DoH /DoQ are used. Having established the state of current deployments, the next goal is to check whether or not a 0-RTT replay attack works or fails in common setups by setting up an authoritative resolver for some (test) DNS name, and attempting such attacks.