The upstream sources were repacked to remove some things:

- The "words" are available in /usr/share/dict/words

- The vs20.. stuff is huge, and defines visual-studio projects we're not using

- avr-str is separately-licensed, large and unused

- mid_point*.png are unused and source-less

- include/etc/....h are generated, and I re-generate them from at build time
  This list is obtained with

    grep -r 'THIS FILE HAS BEEN AUTO GENERATED. DO NOT EDIT THIS FILE' ~/projects/etl/ | grep -v '"//' | awk -F: '{print $1}'

 -- Dima Kogan <dkogan@debian.org>, Sun, 23 Jul 2023 14:28:14 -0700
