nix INTUSE?

[Roland McGrath]

> We cannot entirely get rid of it.  There are several places where we 
> define special *_internal symbols.

I'm not following you.  If something is entirely internal, we just declare
it with attribute_hidden and that's all that's needed.  If something is
exported, then we can use libc_hidden_proto.

> If you want to convert some cases feel free but I'd say there are more 
> important thangs to do.

Well, sure.  I am just trying to verify that my thinking is correct.