[Solr Wiki] Update of "DataImportHandler" by ShalinMangar

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The following page has been changed by ShalinMangar:
http://wiki.apache.org/solr/DataImportHandler

The comment on the change is:
Added note on commits in debug mode

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     * '''commit''': (default 'true'). Tells whether to commit after the operation
     * '''optimize''': (default 'true'). Tells whether to optimize after the operation
     * '''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.
   * '''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`