standardize hostname regex. use latest list of tlds. import constants so we can syntax check
standardize hostname regex. use latest list of tlds. import constants so we can syntax check

git-svn-id: 5bd49132847c26fb0bf09d36ee8823e0080b2740@914 958fd67b-6ff1-0310-b445-bb7760255be9

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