- add 'ip rule' support. First take..

text    data     bss     dec     hex filename
   2999       0       0    2999     bb7 networking/libiproute/iprule.o

networking/libiproute/ipaddress.c

@@ -99,7 +99,7 @@ static void print_queuelen(char *name)
 }
 
 static int print_linkinfo(struct sockaddr_nl ATTRIBUTE_UNUSED *who,
-		struct nlmsghdr *n, void ATTRIBUTE_UNUSED *arg)
+		const struct nlmsghdr *n, void ATTRIBUTE_UNUSED *arg)
 {
 	FILE *fp = (FILE*)arg;
 	struct ifinfomsg *ifi = NLMSG_DATA(n);