globally replace NETFILTER_VERSION with IPTABLES_VERSION to have consistent naming
diff --git a/iptables-standalone.c b/iptables-standalone.c
index 791f950..1564bc9 100644
--- a/iptables-standalone.c
+++ b/iptables-standalone.c
@@ -38,7 +38,7 @@
 	iptc_handle_t handle = NULL;
 
 	program_name = "iptables";
-	program_version = NETFILTER_VERSION;
+	program_version = IPTABLES_VERSION;
 
 #ifdef NO_SHARED_LIBS
 	init_extensions();