[Lucene-hadoop Wiki] Trivial Update of "HadoopMapReduce" by Arun C Murthy

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The following page has been changed by Arun C Murthy:
http://wiki.apache.org/lucene-hadoop/HadoopMapReduce

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  passed to the configured [http://lucene.apache.org/hadoop/docs/api/org/apache/hadoop/mapred/Mapper.html Mapper]. The user supplied Mapper does
  whatever it wants with the input pair and calls	[http://lucene.apache.org/hadoop/docs/api/org/apache/hadoop/mapred/OutputCollector.html#collect(org.apache.hadoop.io.WritableComparable,%20org.apache.hadoop.io.Writable) OutputCollector.collect] with key-value pairs of its own choosing. The output it
  generates must use one key class and one value class.  This is because
- the Map output will be written into a [http://lucene.apache.org/hadoop/docs/api/org/apache/hadoop/io/SequenceFile.html SequenceFile]
+ the Map output will be written into a [http://wiki.apache.org/lucene-hadoop/SequenceFile SequenceFile]
  which has per-file type information and all the records must
  have the same type (use subclassing if you want to output
  different data structures). The Map input and output key-value