Function fastly_sys::fastly_http_req::register_dynamic_backend

pub unsafe extern "C" fn register_dynamic_backend(
    name_prefix: *const u8, 
    name_prefix_len: usize, 
    target: *const u8, 
    target_len: usize, 
    config_mask: BackendConfigOptions, 
    config: *const DynamicBackendConfig
) -> FastlyStatus