A fun example (apparently inspired by a related TLS proposal): https://community.letsencrypt.org/t/adding-random-entries-to-the-directory/33417 https://communi

A fun example (apparently inspired by a related TLS proposal): https://community.letsencrypt.org/t/adding-random-entries-to-the-directory/33417 https://community.letsencrypt.org/t/adding-random-entries-to... (Let's Encrypt creates random protocol extensions on every connection in order to ensure that clients are tolerant of protocol extensions that they don't understand. Breaking changes to the protocol, on the other hand, will be served from a separate API endpoint.)