[Midnightbsd-cvs] [MidnightBSD/src] 6f28ff: add old upgrade docs back

[Lucas Holt]

  Branch: refs/heads/master
  Home:   https://github.com/MidnightBSD/src
  Commit: 6f28ff435a100968bee6e513d1ff44cb8ac36471
      https://github.com/MidnightBSD/src/commit/6f28ff435a100968bee6e513d1ff44cb8ac36471
  Author: Lucas Holt <luke at foolishgames.com>
  Date:   2022-01-17 (Mon, 17 Jan 2022)

  Changed paths:
    A contrib/expat/MIDNIGHTBSD-Xlist
    A contrib/expat/MIDNIGHTBSD-upgrade

  Log Message:
  -----------
  add old upgrade docs back