uBlock Origin v1.12.5b2

Changes

Refactoring of static filtering engine:

• to be more modular and hence make it easier to extent filter syntax
• to lessen overhead overall
• to address #2598
• to extend filter syntax to support csp= filter option
  • See #1930 (comment).

This is an important refactoring and thus I want to make these changes available as soon as possible so that possible regression bugs can found. At first my intention was to add support for csp= filter syntax, but this required some refactoring, and while at it I decided to address a lot of other details regarding static filtering engine which I meant to address since a while, hence the extent of the changes to the code.

I won't be pushing this revision to the dev channel channel of uBO on AMO until the changes here are committed into the master branch (they are currently committed in the csp branch)