- Update to version 2.1+git20210226.daeb191:
* Set trap only after option parsing (#22)

- Update to version 2.1+git20210225.5c541c8:
* Check sub{u,g}id if rootless, and fail early if they're not setup
* Fix creating a container with a specific name with `-c`

- Update to version 2.1+git20210208.a720b25:
* Alleviate the need for zypper in the user toolbox script
* Consolidate logging and help debugging of the user toolbox's script
* Export machine-id and IPC inside the toolbox (IPC, user only)
* Fix (more) formatting...