fix reservation checking

netsplit/funcs_cache.go

@@ -121,7 +121,7 @@ func RetrieveReserved() (ipv4, ipv6 IANARegistry, reserved map[netip.Prefix]*IAN
 		return
 	}
 	ianaReserved4 = new(IANARegistry)
-	ianaReserved4 = new(IANARegistry)
+	ianaReserved6 = new(IANARegistry)
 	if err = json.Unmarshal(dat4, ianaReserved4); err != nil {
 		return
 	}