针对 Only-ipv6

```
token="login_token=${API_ID},${API_Token}&format=json&domain=${domain}&record_type=AAAA&sub_domain=${host}"
Record=$(curl -s -k -X POST https://dnsapi.cn/Record.List -d "${token}")
iferr=$(echo ${Record#*code} | cut -d'"' -f3)
if [ "$iferr" == "1" ];then
record_ip=$(echo ${Record#*value} | cut -d'"' -f3)
echo "[API IP]:$record_ip"
if [ "$record_ip" == "$DEVIP" ];then
echo "IP SAME IN API,SKIP UPDATE."
exit
fi
record_id=$(echo ${Record#*\"records\"\:\[\{\"id\"} | cut -d'"' -f2)
record_line_id=$(echo ${Record#*line_id} | cut -d'"' -f3)
echo Start DDNS update...
ddns=$(curl -s -k -X POST https://dnsapi.cn/Record.Modify -d "${token}&record_type=AAAA&record_id=${record_id}&record_line_id=${record_line_id}&value=${DEVIP}")
ddns_result="$(echo ${ddns#*message\"} | cut -d'"' -f2)"
echo -n "DDNS upadte result:$ddns_result "
echo $ddns | grep -Eo "$IPREX" | tail -n 1
else echo -n Get $host.$domain error :
echo $(echo ${Record#*message\"}) | cut -d'"' -f2
fi
```