PowerDNS sets the DO flag when querying the SOA on the Primary. Setting
the DO flag may trigger truncated responses and the SOA check should
fall-back to TCP. As this fall-back is currently not supported in
-PowerDNS, freshnes checks may fail. If it is known that the Primary
+PowerDNS, freshness checks may fail. If it is known that the Primary
always increases the serial on signature changes, signature comparison
can be turned off by disabling
:ref:`setting-compare-signatures-on-zone-freshness-check`. This will disable