3144. [bug] dns_dbiterator_seek() could trigger an assert when

used with a nonexistent database node. [RT #25358]

lib/dns/tests/testdata/dbiterator/zone1.data

@@ -0,0 +1,21 @@
+$TTL 600
+@		in	soa	localhost. postmaster.localhost. (
+				2011080901	;serial
+				3600		;refresh
+				1800		;retry
+				604800		;expiration
+				600 )		;minimum
+ 		in	ns	ns
+ 		in	ns	ns2
+ns		in	a	10.0.0.1
+ns2		in	a	10.0.0.2
+
+a		in	txt	"test"
+b		in	txt	"test"
+c		in	txt	"test"
+d.e.f		in	txt	"test"
+e		in	txt	"test"
+f.g.h		in	txt	"test"
+f.g.i		in	txt	"test"
+f.g.j		in	txt	"test"
+k		in	txt	"test"