$ curl -I https://proxy.example.xyz
HTTP/1.1 200 Connection established
curl: (60) SSL certificate problem: unable to get local issuer certificate
More details here: https://curl.se/docs/sslcerts.html
curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.
而且 Linux 下 Clash 节点配置必须要开启 skip-cert-verify 选项后才可以正常使用，但是在 macOS 上就正常，curl 可以正常返回站点信息，Clash 也不需要开启 skip-cert-verify ，这种情况是什么问题导致的？
