Command line utilities should exit with an error message when given wrong 
arguments
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                 Key: NUTCH-440
                 URL: https://issues.apache.org/jira/browse/NUTCH-440
             Project: Nutch
          Issue Type: Improvement
            Reporter: Nicolás Lichtmaier
            Priority: Minor


I've lost a lot of time because I wasn't realizing an option was only 
implemented in trunk and not in 0.8.x. Should it have been reported as an error 
I would realize my mistake immediately. So please consider exiting with 
System.exit(1) if a nutch command line tool is given an incorrect option.

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