dmarc: added support for DMARC policy pct=NNN
dmarc: added support for DMARC policy pct=NNN

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