This stopped link reliability from being checked on wikis that only had
Abuse Filter enabled.
Follow-up to e6e104dda5
Change-Id: Ie0045e75633713ad9d529bec647471b2ca0137d3
Have to ignore some calls to AbuseFilter/SpamBlacklist rather than
adding those extensions to directory_list because those extensions don't
pass checks themselves.
Change-Id: If3db9df8a49d8319b08695410a056e1d8e068c15
Checks the URL against SpamBlacklist, and the new
BlockedExternalDomains list in AbuseFilter.
Bug: T349261
Change-Id: I39896ae0d59db4aa918b08b3b2eaacb52bfe4a03
