~~~~~~~~~~~~~~~~
* Implement ``Client.__getattr__`` special attribute to call any object
method, like ``client.write(obj, values)``. This is somewhat
redundant with ``client.execute(obj, 'write', values)`` and its
interactive alias ``do(obj, 'write', values)``.
* Add ``--write`` switch to enable unsafe helpers: ``write``,
``create``, ``copy`` and ``unlink``.
* Tolerate domain without square brackets, but show a warning.
* Add long options ``--search`` for ``-s``, ``--interact`` for ``-i``.