Implementation of DNS stamps:
Server stamps encode all the parameters required to connect to a secure DNS server as a single string. Think about stamps as QR code, but for DNS.
Half of the code comes from the DNS stamps author: https://github.com/jedisct1/go-dnsstamps
This library was made for a single purpose - to add missing stamps implementations: plain DNS and DNS-over-TLS.
TODO: backport to https://github.com/jedisct1/go-dnsstamps
