Summary:
PAM on FreeBSD, unlike on Linux, does not allow users to check their own
password. Instead, we need a suid helper to do it for us. Add such a
helper on FreeBSD.
For now, it is limited to checking users in the local password database
(traditional Unix passwd file). This could and should be extended to use
PAM in a later patch.
Test Plan:
Tested empty pw, wrong pw, correct pw at lock screen; observed correct behavior
in each instance.
Reviewers: q66, zmike
Reviewed By: q66, zmike
Subscribers: cedric, seoz
Differential Revision: https://phab.enlightenment.org/D2355
Conrad Meyer