控制 DNS-over-HTTPS 模式

Controls the mode of the DNS-over-HTTPS resolver. Please note that this policy will only set the default mode for each query. The mode may be overridden for special types of queries such as requests to resolve a DNS-over-HTTPS server hostname. The "off" mode will disable DNS-over-HTTPS. The "automatic" mode will send DNS-over-HTTPS queries first if a DNS-over-HTTPS server is available and may fallback to sending insecure queries on error. The "secure" mode will only send DNS-over-HTTPS queries and will fail to resolve on error. On Android Pie and above, if DNS-over-TLS is active, Brave will not send insecure DNS requests. 值示例： off