Domain restrictions semantics

[ameshkov]

If the following conditions are true:

• pattern === ANY_URL
• domain restriction is not empty
• resource type ===(SUB)DOCUMENT

Then use the host of the request URL to check domain restrictions.

Test rules:

• $csp=script-src 'none',domain=example.org
• $cookie=test,domain=example.org

In the case when there's no "source" hostname, `$domain` should be checked against the request's host.

[sxgunchenko]

core/pull-requests/1500

[sxgunchenko]

Testing instructions:

1. add the following rule: *$empty,domain=google.com
2. open in browser google.com
3. check that page is blank (to ensure the correctness of procedure, check that the request to google.com has no referrer)

[sxgunchenko]

core/pull-requests/1541