[
  [ "mailserver", "fqdn" ],
  [ "passthru", "selfprivacy", "auth", "auth-fqdn" ],
  [ "passthru", "selfprivacy", "auth", "oauth2-provider-name" ],
  [ "selfprivacy", "domain" ],
  [ "selfprivacy", "modules", "auth" ],
  [ "selfprivacy", "modules", "roundcube" ]
]