Lets caller control the list of directories to operate on without
having to edit the script.

Added array task protections for lazy callers who don't care if
array size aligns with work tasks.

Removed debugging command protection intruduced while testing code.

This lets caller control the list of directories to split without
having to edit the script.

Added array task protections for lazy callers who don't care if
array size aligns with work tasks.