- Be a bit smarter in best guess of the minimum size for
  the boot partition if we need one. The function __getBootSize
  now calculates the size using some parameters to keep
  roughly 100MB free. This is more accurate than using a
  fixed size min default value. Setting a custom value for the
  boot partition using the bootpartsize attribute results in

  + Use of bootpartsize without any message if it is bigger
    than recommended value

  + Use of bootpartsize with warning if it is smaller than
    recommended value