pwck does not moan about entries with wrong column count

[Nightwulf]

The pwck tool checks the entries of /etc/passed and /etc/shadow for correctnes.
At least the pwck tool in version 4.5 of the shadow suite does not moan about entries with 8 columns.

Example: add a line like this in /etc/passed and run pwck:
clamav:x:64:64:ClamAntiVirus:/dev/null:/bin/:/usr/bin/nologin

pwck does not complain.

[jgmdev]

A similar issue occurs with grpck (/etc/group), for example:

users:x:100:http:myuser

which should be

users:x:100:http,myuser

isn't detected as an error so grpck doesn't complains about anything. This kind of behavior makes it harder to trouble shoot syntax errors that cause issues on software that read the related files like systemd-sysusers.

[hallyn]

Closed with #175, thanks.