Function fastly_sys::xqd_req_send_async_streaming

#[no_mangle]pub unsafe extern "C" fn xqd_req_send_async_streaming(
    req_handle: RequestHandle, 
    body_handle: BodyHandle, 
    backend: *const u8, 
    backend_len: usize, 
    pending_req_handle_out: *mut PendingRequestHandle
) -> XqdStatus