修改页脚备案为系统变量

@@ -94,7 +94,7 @@
 
 
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-                                <span class="text-muted"><a href="http://www.miitbeian.gov.cn/" target="_blank">粤ICP备15054802号-4</a></span>
+                                <span class="text-muted"><a href="http://www.miitbeian.gov.cn/" target="_blank">{$site.beian}{$site.mail_smtp_host}</a></span>
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                             </p>
                             <span class="small"></span>
                             <span class="small"></span>
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