MaraDNS snapshot update

Another MaraDNS snapshot update today.

There are two main updates: I have updated the sqa/regressions/truncation test to run both on MaraDNS 1.3 and in MaraDNS 1.2 (so I can verify that the test shows the presence of the bug in old 1.2 releases but the non-presence of the bug in 1.3). I have also made some minor touch-up to the bind2csv2.py documentation.

It is available here.