Improve the way negation works for $redirect rules

[ameshkov]

Negating $redirect rules should work just like $replace, $csp and $cookie do.

Negating $redirect

This sort of rules work pretty much the same way it works with $csp and $replace modifiers.

Use @@ to negate $redirect:

• @@||example.org^$redirect -- negates all $redirect rules for URLs that match ||example.org^.

• @@||example.org^$redirect=redirectName -- negates the rule with $redirect=redirectName for any request matching ||example.org^.

• Once it's done, please file a new issue to tsurlfilter: https://github.com/AdguardTeam/tsurlfilter

• Also, open a pull request to KB

[sxgunchenko]

core/pull-requests/2237