Greatly simplify Danga::Client due to no more need for line mode client
Update to latest Danga::Socket
Fix check_earlytalker to use new API
Fix Danga::DNS to use new API
git-svn-id: https://svn.perl.org/qpsmtpd/trunk@643 958fd67b-6ff1-0310-b445-bb7760255be9
Support a finished() callback as the readable() thing didn't work.
git-svn-id: https://svn.perl.org/qpsmtpd/trunk@577 958fd67b-6ff1-0310-b445-bb7760255be9