fix: add delete wifidogx table when destroy

Signed-off-by: Dengfeng Liu <[email protected]>

src/fw_iptables.c

@@ -1199,6 +1199,7 @@ fw3_destroy(void)
 static int
 fw4_destroy(void)
 {
+	execute("nft delete table inet wifidogx", 0);
 	return execute("fw4 restart", 0);
 }