No license

No license. I recommend CC-BY-SA 3.0/4.0 and CC0/MIT for code samples
For documentation, add "LICENSE" or "COPYING" file and add text of the CC-BY-SA text (for [3.0](https://creativecommons.org/2011/04/15/plaintext-versions-of-creative-commons-licenses-and-cc0/), for [4.0](https://creativecommons.org/2014/01/07/plaintext-versions-of-creative-commons-4-0-licenses/)) or the following text:
`This work (except for code samples, which are licensed under MIT/CC0 license) is licensed under the Creative Commons Attribution-ShareAlike 3.0/4.0 license. You can find copy of the CC-BY-SA here: https://creativecommons.org/licenses/by-sa/3.0/ / https://creativecommons.org/licenses/by-sa/4.0/`
For code, just create "LICENSE-CODE" and add MIT/CC0 license text.

# Haxe Manual is licensed under CC-BY, so it's recommended to use it instead of CC-BY-SA. Just change above links.