Wiki blacklist support
excluded wikis refactor
licenced wikis from WF
Refactor blacklist to separate filter
remove leftover comment
remove unused constant
make comment more verbose
Merge remote-tracking branch 'upstream/dev' into PLA-1857

Conflicts:
	extensions/wikia/Search/classes/Services/MovieEntitySearchService.php
Merge pull request #4658 from Wikia/PLA-1857

DAT-1857 Wiki Syndication Blacklist support