docs: def _set_fqdn(self):
          """Get FQDN from LDAP"""
          results = self._search(
              'cn=config',
              '(objectClass=*)',
              ['nsslapd-localhost'],
              scope=ldap.SCOPE_BASE
          )
          if not results and type(results) is not list:
              r = None
          else:
              dn, attrs = results[0]
              r = attrs['nsslapd-localhost'][0].decode('utf-8')
          self._fqdn = r
          log.debug('FQDN: %s' % self._fqdn)