docs: def load_config(self, filename):
          ''' Load values from an *.ini style config file.
  
              If the config file contains sections, their names are used as
              namespaces for the values within. The two special sections
              ``DEFAULT`` and ``bottle`` refer to the root namespace (no prefix).
          '''
          conf = ConfigParser()
          conf.read(filename)
          for section in conf.sections():
              for key, value in conf.items(section):
                  if section not in ('DEFAULT', 'bottle'):
                      key = section + '.' + key
                  self[key] = value
          return self