- Add reference to SASL Channel-Binding Type Capability (XEP-0440) [1] and RFC 5802 [2]
- Update security considerations and business rules
- Clarify <continue/> and tasks
- Add expansion point to inline stream resumption and BIND2 (and possibly others)
- Add optional <user-agent/> element
* That's a lot of XML errors. Sorry.
* Clarified whose additional-data this is.
* <:next> uses <initial-response>.
* Added a bunch of example flows.
Updated according to implementation experience:
* Updated namespace
* Continue "mechanisms" are not; changed these to "tasks".
* Added stream features after Success.
* Don't need complexity of "=" encoding; removed.
* Fixed internal links.
* Updated examples.
