[Solr Wiki] Update of "DataImportHandler" by ShalinMangar

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The "DataImportHandler" page has been changed by ShalinMangar:
http://wiki.apache.org/solr/DataImportHandler?action=diff&rev1=286&rev2=287

Comment:
This statement is wrong. For both full-import and delta-import, commit defaults to true.

     * '''debug''' : (default false). Runs in debug mode.It is used by the interactive development mode ([[#interactive|see here]])
      * Please note that in debug mode, documents are never committed automatically. If you want to run debug mode and commit the results too, add 'commit=true' as a request parameter.
   * '''delta-import''' :  For incremental imports and change detection run the command `http://<host>:<port>/solr/dataimport?command=delta-import . It supports the same clean, commit, optimize and debug parameters as full-import command.
-     * Please note the commit parameter is required for updates (changes to existing data) to appear properly in the index.  Without it your queries may return the old AND new records.
   * '''status''' : To know the status of the current command , hit the URL `http://<host>:<port>/solr/dataimport` .It gives an elaborate statistics on no:of docs created, deleted, queries run, rows fetched , status etc
   * '''reload-config''' : If the data-config is changed and you wish to reload the file without restarting Solr. run the command `http://<host>:<port>/solr/dataimport?command=reload-config`
   * '''abort''' : Abort an ongoing operation by hitting the url `http://<host>:<port>/solr/dataimport?command=abort`