passwd: files nis
group: files nis
This instructs the system to first look in /etc/passwd
or /etc/group for an entry and then fallback and query
NIS for the entry. This configuration does not look for
nor enforce +/- behavior.
If you want to use the +/- semantics you will need to
configure passwd and group as follows:
passwd: compat
group: compat
This instructs the system to enforce the +/- semantics.
