as a component

   * The validate password plugin is converted to component.
   * For mysql-8.0 we will have both component and plugin(But
     plugin will be installed/uninstalled with below deprecate
     warning)
     "validate password plugin' is deprecated and will be
      removed in a future release. Please use validate_password
      component instead"
   * In the next major release we remove the plugin .so file.
   * With the component enabled, we see the system/status
     variables preceded with "validate_password." instead of
     "validate_password_"(for example, if we take 'length'
     system variable we see it as "validate_password.length"
     instead of "validate_password_length")
   * The packaging script should be installing the component
     by default for new installs

   The way it currently works with deprecations and removals
   is the following:
   1. We add a deprecation warning to using the old way and
      we switch the server to use the new way by default for
      new installations.
   2. We expect that people will upgrade their existing
      installations too to avoid the warning.
   3. In the next major release we remove the old way and
      hope that people did #2.