Pam_wheel defaults to use group root, not wheel, if the
group= parameter is not used. Contrary to doc.
The syntax in the doc is also wrong. It refers to the
old /etc/pam.conf configuration file, not /etc/pam.d/*.
"This module is used to enforce the so-called wheel group.
By default, it permits root access to the system if the
applicant user is a member of the wheel group (first, the
module checks for the existence of a 'wheel' group.
Otherwise the module defines the group with group-id 0 to
be the wheel group)."
This was also reported and discarded as bug #921.
Since the code now checks for WHEEL_IS_WHEEL, that flag should be
defined to make the module work as intended.
Fix pulled from current Linux-PAM tree. Will be fixed in next release.