headers: added section # to RFC citation
headers: added section # to RFC citation

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