Re: [PATCH v4 22/28] trailer: prepare to delete "parse_trailers_from_command_line_args()"

>
> From: Linus Arver <linusa@google.com>
>
> Expose more functions in the trailer.h API, in preparation for deleting
>
>     parse_trailers_from_command_line_args()
>
> from the trailers implementation, because it should not be concerned
> with command line arguments (as they have nothing to do with trailers
> themselves). Indeed, the interpret-trailers builtin is the only caller
> of this function inside Git.
>
> Rename add_arg_item() to trailer_add_arg_item() to expose it as an API
> function. Rename new_trailers_clear() to free_new_trailers() because it
> will be promoted into an API function; the API already has
> free_trailers(), so using the "free_*" naming style will keep it
> consistent. Also rename "conf_info" to "trailer_conf" for readability,
> dropping the low-value "_info" suffix as we did earlier in this series
> for "trailer_info" to "trailer_block".