This is a stability and bugfix update to 3.5.1. It contains important fixes that improve operation for certain domains.

Changes since 3.5.1:

Responses without the QR bit set now get matched up to an outstanding query, so that resolution can be aborted early instead of waiting for a timeout. Code in commit ee90f02.

The depth limiter changes in 3.5.1 broke some legal domains with lots of indirection. Improved in commit d393c2d.

Slightly improved logging to aid debugging. Code in commit 437824d and commit 182005e.