Apart from removing the old vibe-d:diet package in favor of diet-ng,
this release most notably contains a number of performance improvements
in the HTTP server, as well as improvements and fixes in the WebSocket
code. Furthermore, initial OpenSSL 1.1.x support has been added and a
few @safe related issues introduced in 0.8.0 have been fixed.

Change log:
https://vibed.org/blog/posts/vibe-release-0.8.1

DUB package:
https://code.dlang.org/packages/vibe-d/0.8.1