def update(self, newcfg):
        """Update current config with a dictionary"""
        for key in newcfg.keys():
            if key not in self._cfg:
                self._cfg[key] = CaseInsensitiveDict()
            for skey in newcfg[key]:
                self._cfg[key][skey] = newcfg[key][skey]
Update current config with a dictionary