conntrack: Include <sys/types.h> before <netinet/icmp6.h>.
FreeBSD and Mac OS X require this.
#include <config.h>
#include <ctype.h>
#include <errno.h>
+#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <string.h>
-#include <sys/types.h>
#include "bitmap.h"
#include "conntrack.h"
