High perf branch merge and fixes git-svn-id: https://svn.perl.org/qpsmtpd/trunk@496 958fd67b-6ff1-0310-b445-bb7760255be9
git-svn-id: https://svn.perl.org/qpsmtpd/trunk@488 958fd67b-6ff1-0310-b445-bb7760255be9