Update ClashMeta.php

[yootus]

clash配置文件中第一行规则让订阅走直连，获取订阅的方式不对，目前是会获取到后台的域名。不太安全，改为直接获取后台设置的订阅域名

[darwinchow]

When multiple subscription domains are configured in the admin panel, Helper::getSubscribeUrl() returns one at random. As a result, the domain the user actually accesses may not match the one specified in the 'direct' rule, rendering that rule ineffective.

[yootus]

When multiple subscription domains are configured in the admin panel, Helper::getSubscribeUrl() returns one at random. As a result, the domain the user actually accesses may not match the one specified in the 'direct' rule, rendering that rule ineffective.

这个原本代码一直都是只返回一个的，如果多个订阅那就获取订阅的时候得返回所有的订阅链接了，直接使用 $urlString = (string)admin_setting('subscribe_url', '');
$subscribeUrlList = $urlString ? explode(',', $urlString) : []; 遍历这个list设置