More fixes and testsuite enhancements.
diff --git a/extensions/libipt_limit.c b/extensions/libipt_limit.c
index 24875ef..e7dda7b 100644
--- a/extensions/libipt_limit.c
+++ b/extensions/libipt_limit.c
@@ -8,7 +8,7 @@
 #include <stdlib.h>
 #include <getopt.h>
 #include <iptables.h>
-#include <linux/stddef.h>
+#include <stddef.h>
 #include <linux/netfilter_ipv4/ip_tables.h>
 #include <linux/netfilter_ipv4/ipt_limit.h>