There is no better place to put it and need to always be required
for backward compatibility. Given Awesome no longer works properly
without `awful`, I put the code there.
The reason for this is that as more of CAPI is brought in line with the
current API guidelines, it is more and more likely the tests will hit
APIs shims (either to test them or because the prototype remains the
same and only the implementation moved to Lua).
Emmanuel Lepage Vallee