[racket] PLaneT License

  Hi everybody.

I'm new to Racket and really impressed with the features and simplicity 
the language offers. I already found the license notes of the racket 
distribution (that wasn't really hard :) ) but i wondered what the 
license for the PLaneT repository is. I searched the documentation but 
couldn't find anything. Neither in the documentation nor on the website 
or in the racket-distribution.
So my question is: Under what license are the PLanet packages released. 
LGPL too? And will this license apply to my code automatically if I 
contribute to the repository?

Thanks a lot,
Karl