Re: [PATCH 15/15] scalar: accept -C and -c options before the subcommand

> The `git` executable has these two very useful options:
>
> -C <directory>:
> 	switch to the specified directory before performing any actions
>
> -c <key>=<value>:
> 	temporarily configure this setting for the duration of the
> 	specified scalar subcommand
>
> With this commit, we teach the `scalar` executable the same trick.
> [...]
> +	while (argc > 1 && *argv[1] == '-') {
> +		if (!strcmp(argv[1], "-C")) {
> +			if (argc < 3)
> +				die(_("-C requires a <directory>"));
> +			if (chdir(argv[2]) < 0)
> +				die_errno(_("could not change to '%s'"),
> +					  argv[2]);
> +			argc -= 2;
> +			argv += 2;
> +		} else if (!strcmp(argv[1], "-c")) {
> +			if (argc < 3)
> +				die(_("-c requires a <key>=<value> argument"));
> +			git_config_push_parameter(argv[2]);
> +			argc -= 2;
> +			argv += 2;
> +		} else
> +			break;
> +	}