[Solr Wiki] Trivial Update of "Deduplication" by KojiSekiguchi

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The following page has been changed by KojiSekiguchi:
http://wiki.apache.org/solr/Deduplication

The comment on the change is:
According to source code, the default of signatureClass is Lookup3

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  == Settings ==
  
  || '''Setting''' || '''Default''' || '''Description''' ||
- ||signatureClass || org.apache.solr.update.processor.MD5Signature || A Signature implementation for generating a signature hash. ||
+ ||signatureClass || org.apache.solr.update.processor.Lookup3Signature || A Signature implementation for generating a signature hash. ||
  ||fields || all fields || The fields to use to generate the signature hash in a comma separated list. By default, all fields on the document will be used. ||
  ||signatureField || signatureField || The name of the field used to hold the fingerprint/signature. Be sure the field is defined in schema.xml. ||
  ||enabled || true || Enable/disable dedupe factory processing ||