code: def add_config_path(self, path):
          
          abspath = util.abs_pathify(path)
          if abspath not in self._config_paths:
              log.info("Adding {0} to paths to search".format(abspath))
              self._config_paths.append(abspath)
docs: Add a path for Vyper to search for the config file in.
          Can be called multiple times to define multiple search paths.