Implement support for hostname wildcards (*. and +.) in Dynamic URL filtering

[PaTTeeL]

https://github.com/PaTTeeL/uBlock/commit/b3d8ee08df755e4e50a5cf19558575e81faf3d25
Introduces support for rules starting with hostname wildcard prefixes (*. and +.) to enhance URL filtering flexibility.
Implementation details:

1. RuleEntry class: Added isSimpleMatch flag. This flag quickly identifies simple prefix rules vs. wildcard rules during initialization.
2. indexOfMatch function: Updated to use isSimpleMatch. Simple rules use existing prefix logic. For wildcard rules:
   • *.: Matches subdomains only (e.g., *.example.com matches www.example.com but not example.com).
   • +.: Matches the base domain and its subdomains (e.g., +.example.com matches example.com and www.example.com).

There is a cloud storage service that utilizes numerous domain names, such as 123684.com, 123865.com, 123pan.cn, and 123pan.com. When attempting to download files from these websites, the process typically involves a sequence of frame requests:

1. An initial frame with a URL like https://web-pro2.123952.com/download-v2 is requested.
2. Subsequently, a sub-frame with the URL https://download-cdn.cjjd19.com/ is loaded.
3. This second sub-frame then initiates another sub-frame request for the actual file download, with URLs containing varying subdomains, such as https://59-47-237-131.pd1.cjjd19.com:30443/download-cdn.cjjd19.com/ for each download.

Manually adding cjjd19.com to individual site-specific rules, such as 123684.com cjjd19.com * noop, is difficult due to the large number of domains. However, using a broad rule like * cjjd19.com * noop appears to be overly permissive and potentially unsafe.

Therefore, is it feasible to implement support for hostname wildcards (*. and +.) within Dynamic URL filtering? I propose that incorporating dynamic URL filtering rules as follows could offer a more secure solution:

* https://*.cjjd19.com/download-cdn.cjjd19.com/ sub_frame noop

A sample URL for context is: https://www.123684.com/s/XIYuVv-GG20H.html#zhpz

[freezer2022]

A duplicate of:

• dynamic URL filtering + subdomain matching gorhill/uBlock#1281 (Dynamic URL filtering)

Also semi-related to / can be considered a duplicate of:

• Add basic hostname wildcards to dynamic filtering rules #439 (Dynamic filtering)
• [Feature request] Add RegEx for dynamic filterrules #2242 (Dynamic filtering)

All of them have been declined in the past.

[gorhill]

Your changes would break URL filtering's user interface counter part in the logger. Consider using static network filters for what you want to accomplish.