Mike Frysinger 496405af79 test-skeleton: add usage information ...

I keep trying to run tests with --help and then remembering that does
nothing when it throws an error.  That means I have to dig into the
source when I want to refer to flags or env vars and re-read a good
amount of code to find the nested locations.

Make this all much more user friendly with a usage screen that gets
printed out whenever an unknown option is specified.

2015-08-05 04:40:00 -04:00

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