compilation fixes for 2.065

- overload of findNextUDA is ambiguous

- __traits getFunctionAttributes isn't available
The documentation you are linking is for 2.066. The 2.065 code path handle all attributes available in 2.065.

If you feel like it might be misleading to some people (those which knows `FunctionAttribute`'s members by heart / use the wrong doc for their compiler) and want to document it, that's fine by me, but dead code is not documentation. 

Especially, this will be much easier to see, and thus misleading to more people than a comment that's explicitly directed to your audience.