Feature: add suppot for specifying delimits via -D/--delimit to FSS read programs.

Feature: add suppot for specifying delimits via -D/--delimit to FSS read programs.

The -D/--delimit parameter accepts multiple types of values:
- "all": apply all delimits.
- "none": do not apply delimits.
- 1: apply limits at depth 1 (this can be any supported whole number and not just 1).
- 1-: apply limits at depth 1 or lesser (this can be any supported whole number and not just 1).
- 1+: apply limits at depth 1 or greater (this can be any supported whole number and not just 1).

The appropriate FSS functions need to be updated to not auto-apply delimits.
Instead, these now pass the delimits array back to the caller.

The FSS Extended List Read program delimits support is currently incomplete.
- A considerable amount of changes are needed to adequately support this.
- A follow up commit will address this issue.