This is a first milestone pre-release on the way to a new major version Apache MINA SSHD 3.0.0.
Like regular releases it is available in Maven Central and in the Apache repositories; the Apache source release is also at the usual location.
See the change notes for what has changed with respect to version 2. In short, we have refactored the implementation of the SSH transport layer, which then enabled providing support for client-side proxies. In doing so we've technically broken a lot of APIs, but the impact on existing code bases using the library should be small in practice. API comparison reports and a (very high-level and tentative) roadmap are available on the 3.0.0 development website.
This pre-release has passed all our quality and regression tests, just like any other release. We encourage interested early adopters to try this pre-release. Be aware that APIs might change in future milestone pre-releases.
Full Changelog: sshd-2.16.0...sshd-3.0.0-M1