+5930. [bug] Fix DiG query retry and fail-over bug in UDP mode.
+ Also simplify the overall retry and fail-over logic to
+ make it behave predictably, and always respect the
+ documented +retry/+tries count set by a command-line
+ option (or use the default values of 2 or 3
+ respectively). [GL #3407]
+
5929. [func] The use of the "max-zone-ttl" option in "zone" and
"options" blocks is now deprecated; this should
now be configured as part of "dnssec-policy"