[Nutch Wiki] Update of "CommonCrawlDataDumper" by darrencheng

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The "CommonCrawlDataDumper" page has been changed by darrencheng:
https://wiki.apache.org/nutch/CommonCrawlDataDumper?action=diff&rev1=2&rev2=3

  bin/nutch commoncrawldump -outputDir outCommonCrawl -segment testCrawl/segments
  }}}
  
+ If when you start running the script later you start getting an error called {{{OutOfMemoryError}}}, try changing the JAVA_HEAP_MAX variable in line 128 of {{{bin/nutch}}} to an appropriate value. 
+ 
  The {{{bin/nutch commoncrawldump}}} program dumps out all Nutch segments included in {{{testCrawl/segments}}} to {{{outCommonCrawl}}} folder, making one CBOR-encoded file for each crawled file. The tool will show a short report as follows:
  
  {{{