Discuss draft-ietf-tls-dnssec-chain-extension
- Problem statement recap.
- Discuss client-side caching semantics and use cases.
- Discuss need (or not) for extension pinning.
- Review some open gaps:
  - Lack of a port number in the client side of the extension.
  - Lack of downgrade protection for existing applications.
  - Lack of discussion of virtual hosting.
  - Needless complexity from RRset ordering requirements.
- Wrap up.