Bug#1078122: login: sg does not work (does nothing)

[Gábor Németh]

The commit [1] got merged in upstream. If/when released I think the sg 
symlink can be resurrected [2] (although with the new syntax `sg grp 
cmd` is equivalent to `newgrp grp cmd`).

BR,
Gábor
[1] 
https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=a3bf59a6f497a9314d4671ddd481235e2eecbbec
[2] 
https://salsa.debian.org/debian/util-linux/-/commit/deb01fd30619088a86335e44d964c54d5ca711ac