'Checks to see if the server is ready for SNI challenges.
:param addrs: Addresses to check SNI compatibility
:type addrs: :class:`~certbot_apache.obj.Addr`'

def make_addrs_sni_ready(self, addrs):

    if (self.version >= (2, 4)):
        return
    for addr in addrs:
        if (not self.is_name_vhost(addr)):
            logger.debug('Setting    VirtualHost    at    %s    to    be    a    name    based    virtual    host', addr)
            self.add_name_vhost(addr)
