Bug#730456: please add an option to complain about bad adduser invocation in postinst

[Marc Haber <mh+debian-packages@zugschlus.de>]

Package: lintian
Version: 2.5.19
Severity: wishlist

Hi.

adduser --system automatically puts the new system users' home
directory under /home and creates it. This makes a package
insta-buggy, and piuparts has a check for that filing rc bugs against
packages that do so.

The adduser maintainer does not feel comfortable with changing
adduser's default behavior to avoid those bugs (#679746). He ha sound
arguments supporting his case.

Please consider adding a lintian check that prints a warning if
adduser is called from a packages' maintainer script without setting
--home to a directory outside of /home. Please note that maintainer
script lines invoking adduser are frequently split among multiple
lines using backslash notation.

Greetings
Marc