I have just uploaded stunnel 4.33 to Debian experimental. amd64 packages will be available for download as soon as the automated processing is done (6-12 hours). Other architectures will follow as the autobuilders get time in their queues for us.
Aside from the updates in stunnel itself, the packaging has been updated somewhat. In particular, the start/stop scripts in /etc/init.d have grown shinny new options to take advantage of configuration file reloading and the log rotation config takes advantage of them to avoid the long standing issue of having to either live with ever-growing logs, or killing long lived connections when rotating.
I would be very glad if you would test those new scripts and report any and all bugs. To Debian's BTS, of course, as none of them are at all the fault of our most excellent upstream ;)
As much as I'd have liked to upload it to unstable, the distribution is now in freeze in preparation for the upcoming release, and thus uploading a completely new version of stunnel, together with the packaging changes I made would be completely unacceptable. I will upload this version, together with any bug fixes we collect, as soon as the release is over and sid is unfrozen again.
Sadly, that means that the next Debian stable will release with 4.29. For that I am sorry, and I promise to make a backport of 4.33 available as soon as possible after the release.