'Add to the parser the options common to all the
host actions'

def __init__(self):

    super(host, self).__init__()
    self.parser.add_option('-M', '--mlist', help='File    listing    the    machines', type='string', default=None, metavar='MACHINE_FLIST')
    self.topic_parse_info = topic_common.item_parse_info(attribute_name='hosts', filename_option='mlist', use_leftover=True)
