获取cf账户+cf token 
export CF_Email="abc@abc.com"
export CF_Key="xxxxxabc"

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curl https://github.com/acmesh-official/acme.sh I sh
~/.acme.sh/acme.sh --set-default-ca --server letsencrypt
~/.acme.sh/acme.sh --issue --dns dns_cf -d xui.lil0.de --keylength ec-256
~/.acme.sh/acme.sh --install-cert -d xui.lil0.de --ecc \
  --key-file /root/xui.key \
  --fullchain-file /root/xui....