Add support for SMC7401BRA:

ddclient support several kind of firewall to retrieve IP address, two of
them are smc-barricade and smc-barricade-alt, but these both doesn't
work with an SMC7401BRA.

Index: ddclient
===================================================================
--- ddclient.orig	2006-12-01 23:22:36.958923399 +0100
+++ ddclient	2006-12-01 23:25:09.796607052 +0100
@@ -73,6 +73,11 @@
 				  'url'  => '/status.htm',
 				  'skip' => 'IP Address',
 			        },
+    'smc-barricade-7401bra'  => {
+				  'name' => 'SMC Barricade 7401BRA FW',
+				  'url'  => '/admin/wan1.htm',
+				  'skip' => 'IP Address',
+			        },
     'netgear-rt3xx'          => {
 				  'name' => 'Netgear FW',
 				  'url'  => '/mtenSysStatus.html',