anchor.diff:  *Details* +
   The `xpack.security.authc.accept_default_password` setting has not had any affect
   since the 6.0 release of {es}. It has been removed and cannot be used.
  +
  +*Impact* +
  +Discontinue use of the `xpack.security.authc.accept_default_password` setting.
  +Specifying this setting in `elasticsearch.yml` will result in an error on
  +startup.
   ====
   
   [[roles-index-cache-removed]]
  
positive.code: The `transport.profiles.*.xpack.security.type` setting has been removed since
  the Transport Client has been removed and therefore all client traffic now uses
  the HTTP transport. Transport profiles using this setting should be removed.
  ====
  
  [discrete]
  
negative.code: *Details* +
  The `xpack.security.authc.realms.{type}.{name}.order` setting is now required and must be
  specified for each explicitly configured realm. Each value must be unique.
  
  *Impact* +
  The cluster will fail to start if the requirements are not met.
  
  For example, the following configuration is invalid:
  