Emil Kronborg

@jluebbe Hi Jan. Did you have a chance to look at this PR and [this PR](https://github.com/labgrid-project/labgrid/pull/1009) yet?

> * [30a0e38](https://github.com/labgrid-project/labgrid/commit/30a0e38ca5f38a5e048b47a6d09371e411655112) can probably be dropped now You are right. Joshua made this commit to build version 4.3.3. In Ubuntu 22.04, ser2net is version 4.3.4. > * what about...

> Please add a short explanation why you revert the commit, so the git history contains all necessary information and we do not need to dig into the PR comments...

> As a first step, I've bumped the docker base image to Debian bullseye: #1129. I guess Debian bookworm will become stable around July. Bumping the image is fine, but...