Incorrect type alias generated from curl/lib/setopt.c

[thedataking]

Generated:

pub type CURLU = Curl_URL;

Expected (insofar that it allows compilation to proceed):

pub type CURLU = crate::urlapi::Curl_URL;

[rinon]

The actual error here is that *mut CURLU is unsized:

error[E0277]: the size for values of type `setopt::Curl_URL` cannot be known at compilation time
    --> src/setopt.rs:5823:43
     |
5823 |         10282 => { (*data).set.uh = param.arg::<*mut CURLU>() }
     |                                           ^^^ doesn't have a size known at compile-time
     |
     = help: the trait `std::marker::Sized` is not implemented for `setopt::Curl_URL`
     = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
     = note: required because of the requirements on the impl of `core::ffi::sealed_trait::VaArgSafe` for `*mut setopt::Curl_URL`

We should implement VaArgSafe for raw pointers to unsized types, but this will need to be upstreamed.

[rinon]

Blocked on upstream compiler support, see rust-lang/rust#61126