'Add TLS-SNI-01 challenge conf file into configuration.
Adds TLS-SNI-01 challenge include file if it does not already exist
within mainConfig
:param str main_config: file path to main user apache config file'

def _conf_include_check(self, main_config):

    if (len(self.configurator.parser.find_dir(parser.case_i('Include'), self.challenge_conf)) == 0):
        logger.debug('Adding    Include    %s    to    %s', self.challenge_conf, parser.get_aug_path(main_config))
        self.configurator.parser.add_dir(parser.get_aug_path(main_config), 'Include', self.challenge_conf)
