Min/Max ID clarification; --sort-id-desc

Min/Max ID clarification; --sort-id-desc

Replace start-id/end-id arguments with min-id/max-id to avoid any
confusion when using descending sort options.

Add support for --sort-id-desc to process records in reverse order of
record ID.  This works better across multiple batches when you don't
know what both the min/max ID values are goign to be ahead of time.

Signed-off-by: Bill Erickson <berickxx@gmail.com>