===========================
**Enhancements**
- 611: use `ruff` code style checker instead of flake8 + isort (much faster +
makes many more code quality checks).
**Bug fixes**
- 604: client connection may be reset in PASV/EPSV mode during TLS handshake.
(patch by Benedikt McMullin)
- 607: possible infinite wait in Epoll (patch by stat1c-void)
- 607: possible infinite traceback printing in DTPHandler (patch by
stat1c-void)
- 613: (CRITICAL) bugfix for TLS disconnect causing 100% CPU usage. (patch by
hakai)
- 614: close connection on SSL EOF error, instead of erroneously replying with
"226 Transfer completed."