[Pre-pre-RFC] "splatting" for named arguments and function overloading

Oh, I didn't mean to say "I don't want Rust-to-Rust overloading", just "it's not a goal of mine to get that". Where I'm coming from is: "tiny syntactic sugar gets us pretty nice FFI powers and also extends to named arguments which we wanted anyways". I love it when we get a lot of benefit for not much design complexity, something about this "fits well" in the language to my taste. I don't mind that this gives a Rust-to-Rust overloading feature. I'm sure some ppl will find APIs where this is really beneficial to have and the rest won't bother with the weird trait dances required.