server must send tags with string format

    tags[t] = max(len(self.td(t, v)), tags.get(t, len(str(t))))
TypeError: object of type 'int' has no len()

now export tag uname

fix syntaxt error on get_tags

tvincent> passwd tvincent_station
Error: <type 'exceptions.AttributeError'>: 'Cli' object has no attribute
'interactive'
Warning: This is a not expected error, please report it!