This major update has a long list of changes, but the introduction of the following features might be worth mentioning.
- TCP latency optimization (slide deck)
- response throttling
- various mruby scripts for fine-grained access control (please refer to the How-to section of the configuration document)
Also, there has been a lot of work done in the reverse proxy implementation to improve interoperability.
In the next major release, we plan to add support for TLS 1.3 as well as more knobs for logging. Stay tuned!