Make this compile on 32-bit architectures:

- Add prototypes.
- Add a forward-decl to avoid a cyclic dependency graph.

sys/netinet/ip_proxy.h

@@ -5,7 +5,7 @@
  * provided that this notice is preserved and due credit is given
  * to the original author and the contributors.
  *
- * $Id: ip_proxy.h,v 1.1.1.1 1997/05/26 15:18:15 darrenr Exp $
+ * $Id: ip_proxy.h,v 1.2 1997/05/27 01:23:50 thorpej Exp $
  */
 
 #ifndef	__IP_PROXY_H__
@@ -19,6 +19,7 @@
 #define	AP_SESS_SIZE	53
 
 struct	nat;
+struct	ipnat;
 
 typedef	struct	ap_tcp {
 	u_short	apt_sport;	/* source port */
@@ -85,5 +86,6 @@ extern void ap_free __P((aproxy_t *));
 extern void aps_free __P((ap_session_t *));
 extern int ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *));
 extern aproxy_t	*ap_match __P((char, char *));
+extern int ap_ok __P((ip_t *, tcphdr_t *, struct ipnat *));
 
 #endif /* __IP_PROXY_H__ */