GRMLBASE/21-usersetup: use adduser for adding user to group
authorMichael Prokop <mika@grml.org>
Thu, 28 Jul 2022 08:54:18 +0000 (10:54 +0200)
committerMichael Prokop <mika@grml.org>
Thu, 28 Jul 2022 08:54:18 +0000 (10:54 +0200)
adduser >=3.122 no longer supports adding a user to a group via its
addgroup binary (see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=664869), so let's
invoke adduser instead.

Closes: https://github.com/grml/grml-live/issues/115


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