[fpc-other] Microsoft makes its compiler C# open source

[Santiago A.]

With Apache 2.0 license (a least part, it has a lot of dependencies)

https://medium.com/microsoft-open-source-stories/how-microsoft-rewrote-its-c-compiler-in-c-and-made-it-open-source-4ebed5646f98

-- 
Saludos

Santiago A.