Make ipstealth global as we need it in ip_fastforward too.

sys/netinet/ip_input.c

@@ -198,7 +198,7 @@ SYSCTL_INT(_net_inet_ip, IPCTL_DEFMTU, mtu, CTLFLAG_RW,
 #endif
 
 #ifdef IPSTEALTH
-static int	ipstealth = 0;
+int	ipstealth = 0;
 SYSCTL_INT(_net_inet_ip, OID_AUTO, stealth, CTLFLAG_RW,
     &ipstealth, 0, "");
 #endif

sys/netinet/ip_var.h

@@ -150,6 +150,9 @@ extern u_short	ip_id;				/* ip packet ctr, for ids */
 #endif
 extern int	ip_defttl;			/* default IP ttl */
 extern int	ipforwarding;			/* ip forwarding */
+#ifdef IPSTEALTH
+extern int	ipstealth;			/* stealth forwarding */
+#endif
 extern u_char	ip_protox[];
 extern struct socket *ip_rsvpd;	/* reservation protocol daemon */
 extern struct socket *ip_mrouter; /* multicast routing daemon */