dkim: corrected log entry, added comment
dkim: corrected log entry, added comment

smtpd/qpsmtpd,sentinelleader/qpsmtpd-dev,priyadi/qpsmtpd,sieutruc/qpsmtpd,sieutruc/qpsmtpd,sieutruc/qpsmtpd,salvis/qpsmtpd,priyadi/qpsmtpd,msimerson/qpsmtpd,salvis/qpsmtpd,msimerson/qpsmtpd,priyadi/qpsmtpd,smtpd/qpsmtpd,sentinelleader/qpsmtpd-dev