bug#76897: id improvements

Nicolas said: > Context: > $ cat /etc/passwd > nicolas:x:1000:2001::/home/nicolas:/bin/bash > claude:x:1000:2002::/home/claude:/bin/zsh > $ cat /etc/group > gnicolas:x:2001: > gclaude:x:2002: > > Test case: > localhost login: claude > $ getent passwd claude > claude::1000:2002::/home/claude:/bin

bug#76897: id improvements

Context: $ cat /etc/passwd nicolas:x:1000:2001::/home/nicolas:/bin/bash claude:x:1000:2002::/home/claude:/bin/zsh $ cat /etc/group gnicolas:x:2001: gclaude:x:2002: Test case: localhost login: claude $ getent passwd claude claude::1000:2002::/home/claude:/bin/zsh $ id claude uid=1000(nicolas) gi