'Return string representation of Addr'

def to_string(self, include_default=True):

    parts = ''
    if (self.tup[0] and self.tup[1]):
        parts = ('%s:%s' % self.tup)
    elif self.tup[0]:
        parts = self.tup[0]
    else:
        parts = self.tup[1]
    if (self.default and include_default):
        parts += '    default_server'
    if self.ssl:
        parts += '    ssl'
    return parts
