the logging of error-report queries is no longer activated by
the view's "send-report-channel" option; that now only configures
the agent-domain value that is to be sent in authoritative
responses. the warning that was logged when "send-agent-domain"
was set to a value that is not a locally configured zone has
been removed.
error-report logging is now activated by the presence of an
authoritative zone with the "log-report-channel" option set to
"yes". this is not permitted in the root zone.
NOTE: a zone with "log-report-channel yes;" should contain a
"*._er" wildcard, but that requirement is not yet enforced.
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