http://sr7wtu3yb6cv5zz4gshbjnc5cfofv5ulj6jkxgzej4zhupcsriahp6id.onion/license.html
A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case of
interfaces specified for a particular programming language, one that
is widely used among developers working in that language.
The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form of
...