docs: def freeze_args(subparsers):
      """Add command line options for the freeze operation"""
      freeze_parser = subparsers.add_parser('freeze')
      freeze_parser.add_argument('--icefile-prefix',
                                 dest='icefile_prefix',
                                 help='Prefix of icefilename')
      secretfile_args(freeze_parser)
      archive_args(freeze_parser)
      vars_args(freeze_parser)
      base_args(freeze_parser)