Function proj_sys::proj_download_file

pub unsafe extern "C" fn proj_download_file(
    ctx: *mut PJ_CONTEXT,
    url_or_filename: *const c_char,
    ignore_ttl_setting: c_int,
    progress_cbk: Option<unsafe extern "C" fn(arg1: *mut PJ_CONTEXT, pct: f64, user_data: *mut c_void) -> c_int>,
    user_data: *mut c_void
) -> c_int