auth: adding tests (should have attached with a previous commit)
auth: adding tests (should have attached with a previous commit)

msimerson/qpsmtpd,salvis/qpsmtpd,sieutruc/qpsmtpd,salvis/qpsmtpd,sieutruc/qpsmtpd,priyadi/qpsmtpd,priyadi/qpsmtpd,msimerson/qpsmtpd,sieutruc/qpsmtpd,smtpd/qpsmtpd,smtpd/qpsmtpd,priyadi/qpsmtpd