ipdb: @update'able methods API changed

 + `direct` goes first as the required

add_ip(), del_ip()
------------------

transform '10.0.0.1/24' into '10.0.0.1', 24; method w/o mask will explode::
	ip.tap0.add_ip('10.0.0.1', 24)
	ip.tap0.add_ip('10.0.0.1/24')

add_port(), del_port()
------------------------

transform interface into interface['index']::
	ip.bond0.add_port(ip.tap0.index)
	ip.bond0.add_port(ip.tap0)