[tlbuild] TeX Live builds -- second summary

[Karl Berry]

    -#include "Features.h"
    +#include "TLFeatures.h"

Even though it's simple, it seems less than ideal, since the upstream
library has nothing to do with TL, so we'd have to maintain the change
in perpetuity.

Why does cygwin need the #include name Features.h?  Why isn't the file
in TL found first due to the -I's?

Thanks,
Karl