++ed by:
TEMPIRE IOANR GARU CRUX ABRAXXA

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John SJ Anderson
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OptreeCheck selftest harness

This file is primarily to test services of OptreeCheck itself, ie checkOptree(). %gOpts provides test-state info, it is 'exported' into main::

doing use OptreeCheck runs import(), which processes @ARGV to process cmdline args in 'standard' way across all clients of OptreeCheck.