Added deprecation messages for incorrect capitalization in scripts

- These messages are temporary, only meant to help those with custom
  scripts to transition them to the correct case-sensitive syntax. If
  you ignore the deprecation messages you encounter, your scripts may
  continue to work just as they did until now, but this will no longer
  be true in the near future, and they may stop working at any time.

If you ignore this, and your scripts break, you'll get to keep the
pieces :)

Signed-off-by: Haru <haru@dotalux.com>