Check also signatures are only shown when DNSSEC is requested

Sanity/utils/delv-smoke-test/runtest.sh

@@ -60,6 +60,7 @@ rlJournalStart
 			rlRun -l "dig +short @$NS -t txt -c ch -q version.bind" 0 "Query version of server $NS"
 			rlRun "sed -e '/$NS/ d' -i /etc/resolv.conf"
 		fi
+		rlRun -c "dig @$NS | grep -w RRSIG" 1 "Check signatures are not present always on $NS"
 	done
 	if [ -z "$DNSSEC" ]; then
 		DNSSEC=no