code to increase the productivity of some recipes which was originally part of
[moreblocks](https://github.com/minetest-mods/moreblocks/) but has since been removed.

copied directly from
https://github.com/minetest-mods/moreblocks/blob/1a03b041dd49cf52e8d5d84e72206718055b1455/redefinitions.lua

## License

Copyright © 2011-2020 Hugo Locurcio and contributors

- More Blocks code is licensed under the zlib license, see
  [`LICENSE.md`](LICENSE.md) for details.
- Unless otherwise specified, More Blocks textures are licensed under
  [CC BY-SA 3.0 Unported](https://creativecommons.org/licenses/by-sa/3.0/).

`moreblocks_copperpatina.png` was created by pithydon, and is licensed under
[CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/).