New review comment by flupe on void-packages repository

https://github.com/void-linux/void-packages/pull/33302#discussion_r721769855

Comment:
`sudo su -s` instead of `sudo -u _soju -s` is my mistake, and my bad reason for doing this instead of `sudo -u sojuctl ...` was to split the command in two, making shorter lines and the `sojuctl` call on its own. But indeed, latter is better.

> Would probably make sense to also disable the shell for the _soju user if its not required.

Isn't this the default when defining a system user from a template? That is, setting the shell to `/sbin/nologin`.