A nameserver that left a domain's delegation was reported twice: as the
domain's NS Change, and by the check of the domain's own records as an
error-level NS Failure saying it disappeared. The check of a name's
records now sends one NS Change at warning level, starting Hostname: or
Domain:, listing the nameservers it was asked at before and not now.
For a domain it leaves out those of its saved delegation, which the
domain's own NS Change lists, so a domain's new delegation is now
notified and saved only after, and only together with, its records.
Nothing is sent for a nameserver that joins.
A nameserver that was failing before it left is now listed too; the
NS Failure skipped it.
Model: opus-5-5
clawbot