XXX remove HAVE_ALTQ hack after bump to 5.6-current
--- config.h.orig	Wed Nov  7 07:34:18 2007
+++ config.h	Tue Apr 22 05:05:05 2014
@@ -74,11 +74,28 @@
 #define HAVE_PFSYNC_STATE
 #endif
 
+#if OS_LEVEL > 43
+#define HAVE_PFSYNC_KEY
+#define HAVE_NETWORK_ORDER
+#endif
+
+/* #if OS_LEVEL > 46 */
+#undef HAVE_RULE_NATPASS
+/* #endif */
+
+#if OS_LEVEL > 55 || 1
+#undef HAVE_ALTQ
+#endif
+
 #ifdef HAVE_PFSYNC_STATE
 typedef struct pfsync_state pf_state_t;
 typedef struct pfsync_state_host pf_state_host_t;
 typedef struct pfsync_state_peer pf_state_peer_t;
+#ifdef HAVE_NETWORK_ORDER
+#define COUNTER(c) ((((u_int64_t) ntohl(c[0]))<<32) + ntohl(c[1]))
+#else
 #define COUNTER(c) ((((u_int64_t) c[0])<<32) + c[1])
+#endif
 #define pfs_ifname ifname
 #else
 typedef struct pf_state pf_state_t;