nsupdate system test fails intermittently
A new failure mode of the "nsupdate" system test has been observed (https://gitlab.isc.org/isc-projects/bind9/-/jobs/36547):
I:nsupdate:check that unixtime serial number is correctly generated (7) I:nsupdate:out-of-range serial=1534238386 > now=1534238385 I:nsupdate:failed
I do not know whether it is in any way related to #424 (closed) or the fix for it. Artifacts kept.