Add customization to country code second-level domains in DefaultPolicy of lib http.cookiejar

Feature or enhancement

Proposal:

This is a feature request of

• adding a "additional_country_code_slds" attribute to DefaultPolicy in lib http.cookiejar
• updating the default list of country code slds, which is previously discussed in #135528

The idea is basically from @Zheaoli. yes I think hard code is never a good idea because it's not even possible to add all country code slds to the list, since every country has its unique naming strategy (or it could be incrediblely long). Just updating "well-known slds" is kind of meaningless, I think.

So I think we can make the sld list customizable, let users to set them in their specific scene.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

#135529
#135528

Linked PRs

• gh-135569

从 lib http.cookiejar 中的 DefaultPolicy 开始，然后阅读讨论 #135528 和 #135529，以及关联的 PR gh-135569。完成的标准是 DefaultPolicy 支持 additional_country_code_slds 自定义，并且相关更改和测试覆盖国家/地区代码 SLD 的行为。