[bug 994097] Add questions_enabled column to products.
[bug 999633] Only show get community support if forum is enabled
[bug 999669] Add locales removed in fb6559b3 to NON_SUPPORTED_LOCALES.
[bug 999669] Fix EU Ballot middleware.

It was getting triggered by the Basque locale (eu).
Bad logic was bad.
[Bug 998767] Fix {for not win}
Fix bad variable name in ui.js

This was a bug introduced in dda371ea.
[bug 997781] Implement html caching for article page.
Fix i18n.js
[bug 951617] Exclude How to articles from L10N metrics