globally replace NETFILTER_VERSION with IPTABLES_VERSION to have consistent naming
diff --git a/extensions/libip6t_REJECT.c b/extensions/libip6t_REJECT.c
index a145f44..b8b9732 100644
--- a/extensions/libip6t_REJECT.c
+++ b/extensions/libip6t_REJECT.c
@@ -154,7 +154,7 @@
 struct ip6tables_target reject
 = { NULL,
     "REJECT",
-    NETFILTER_VERSION,
+    IPTABLES_VERSION,
     IP6T_ALIGN(sizeof(struct ip6t_reject_info)),
     IP6T_ALIGN(sizeof(struct ip6t_reject_info)),
     &help,