Shellcheck warned about creating content for a python array. As the
string will be printed literally into the config, the warning does not
match to the current case.
Because someone *want* to use something other than just gunicorn, it was
extracted to a own type. Because gunicorn is a bit deep in the netbox
installation process, it's a bit harder to isolate it.
`__netbox_uwsgi` will come, too.