Bug 965867 - Pre: Copy Utils.getLanguageTag from Fennec.
Bug 965867 - Part 1: Extract URLs into strings.xml.in.
Bug 965867 - Part 2: Linkify forgot password URLs, and URLs in StatusActivity.
Bug 965867 - Part 3: Bump "Old Firefox" link.
Bug 965867 - Part 4: Bump COPPA URL.