rust non-free-compatible trademark

[Richard Kenner]

> A Certification Mark is the proper way to formally and legally enforce such
> requirements. 

BTW, nobody is or was at all confident that the Ada mark was legally
enforcable.  I'm in the camp that it isn't.

> telling people they cannot patch the source code without permission

Nobody is telling people that.  What they're saying is the same thing as
the GPL does: it you distribute modified code, you need to be clear that
what you're distributing is a modification.