Having a different ParserOptions for each content model isn't feasible
in an MCR world. And the only thing using this was Wikibase, which has
been fixed to do what it needs in a different way.
Bug: T194263
Change-Id: Ib8ed827012c7bd73fcdaa6c0c6edd44869c79f14
Depends-On: I01373b29ee25fa9346c6b0317155be4ccdc8c515
Introduce BaseBlacklist::getSpamBlacklist() and getEmailBlacklist()
as type-documented alternatives to getInstance( 'email/spam' ) so we
don't need to keep documentating types in a comment when using a function
that isn't included in the base class.
Change-Id: Ic8bd8f803ddbce1294707d5f1d62b701e24d8c6e
