SearchThis release reverts some of the bug fixes that went into the last two releases of Varnish Enterprise. The changes that are being reverted are related to the TLS layer, and those fixes are being removed because they were causing issues with timeout management and hanging connections.
The original reason for the changes to the TLS layer was to address a long standing issue related to TLS over HTTP/2 (tracked as VS issue #2027), which can cause occasional crashes and instability. While the cause of issue #2027 is well understood at this point in time, unfortunately the approaches to rectify it has caused unwanted side effects.
A permanent fix for #2027 will be included in a future release.
Please see the changelog for the complete list of changes.