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

從 lib http.cookiejar 中的 DefaultPolicy 開始，然後閱讀討論 #135528 和 #135529，以及連結的 PR gh-135569。完成的標準是 DefaultPolicy 支援 additional_country_code_slds 自訂，且相關變更與測試涵蓋國家/地區代碼 SLD 的行為。