Function gio_sys::g_socket_client_connect_to_host_async

pub unsafe extern fn g_socket_client_connect_to_host_async(client: *mut GSocketClient,
                                                           host_and_port: *const c_char,
                                                           default_port: u16,
                                                           cancellable: *mut GCancellable,
                                                           callback: GAsyncReadyCallback,
                                                           user_data: gpointer)