Add regexp support for $domain modifier

[slavaleleka]

now there is no chance to create single cosmetic rule for hiding the same element on such domains:
example1.com, example2.com, example3.org

it would be nice if $domain modifier supports regular expressions, just like $path does

something like this:
[$domain=/example[0-9]\.(com|org)/]##.ad

[ameshkov]

Why limit just to the cosmetic rules? If we do it here, we should extend it to basic rules as well.

@sfionov can we include this in v1.10 for instance?

[sfionov]

Yes, assigned to 1.10

[Alex-302]

Another one example
AdguardTeam/AdguardFilters#121186 (comment)
domains changed every day.

[dnmTX]

@AdguardTeam maybe unrelated question but what about redirects? For example links from voe.sx are allways redirected to another domain and they change those domains very frequently. Here is a example:
Original Link: https://voe.sx/ffgecklhux79 redirects(as of now) to: https://tubelessceliolymph.com/ffgecklhux79
So basically rules that are applied for voe.sx simply don't work. And domains like tubelessceliolymph.com are disposable and replaced every week or so and user(s) like me have to reapply the same rules to the new domain.
Any workaournd(s) for this?

[krystian3w]

uBo implemented regex, if someone trust something like:

/bad-js.$domain=/[a-z-]{18}\.[\w]{2,20}/
/[a-z-]{18}\.[\w]{2,20}/##.bad-class
!
! regex in the dumb version - rather, the webmaster fell how to avoid falling into a safe regex.

but fail for , in cosmetic/scriptlet filters and | in network filters if gorhill rejected repair:

uBlockOrigin/uBlock-issues#2234 (comment)

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In theory, network filtering can be unprotected by domain=/from= and cosmetic filtering can be based on the site's permanent DOM tree (No match to 99.9% of the rest of the sites on the Internet).

The scriptlet is also still possible to run all over the Internet in uBo, but there have been considerations for years whether to secure this with a minimum of "I am an advanced user" activation.

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Also voe is covered sometimes: uBlockOrigin/uAssets@5a660a9

(Unfortunately, I don't see how to turn these 36 domains into which regex - The site appears to have no fixed pattern (diffrent words, number order))