bump RAM from 50 to 75MB
bump RAM from 50 to 75MB

necessary on my FreeBSD 8 amd64 system. I'm guessing higher requirements
will be the norm on 64 bit systems.

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