Add options to disable the `Set your own DNS server` and `Auto-update Lists` options.

[tumatanquang]

Current Issues:

• Set your own DNS server: Currently, Google DNS is always used by default, and there is no option to disable this DNS override to use the system's (network's) default DNS. Of course, I could reconfigure it using the Custom DNS option, but this is both time-consuming and defeats the purpose of this option.

• Auto-update Lists: Currently, there is also no option to disable automatic updates (checking and) this is inconvenient if you don't want to automatically update the filter, or redundant if you don't use the filter.

Suggested Solutions:

• Set your own DNS server: Add an option to disable DNS override (should be set as default). When using this option, Athena will use the system's (network's) default DNS.

• Auto-update Lists: Add an option to disable automatic updates. When using this option, Athena will not schedule, check, or automatically update the filters.