Load the conda configuration file.

        If both user and system configuration exists, user will be used.

def load_rc(self, path=None, system=False):
        """
        Load the conda configuration file.

        If both user and system configuration exists, user will be used.
        """
        if os.path.isfile(self.user_rc_path) and not system:
            path = self.user_rc_path
        elif os.path.isfile(self.sys_rc_path):
            path = self.sys_rc_path

        if not path or not os.path.isfile(path):
            return {}

        with open(path) as f:
            return yaml.load(f) or {}