--auto-delete should be --auto_delete

[vitorgalvao]

_ instead of -, to be consistent with the other options. I’d submit a PR now, but that would conflict with #52, which needs to be handled first.

I’d also like to run other consistency improvements in help (capitalisation is inconsistent) and in the script as a whole ( $var and ${var} are used interchangeably without good logic), but those are all dependent on the aforementioned PR.

[jomo]

Fixed the other way in 0fe3bdf, thanks!