Replaced Kerberized SSL for image transfer and fsck with SPNEGO-based solution
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                 Key: HDFS-2617
                 URL: https://issues.apache.org/jira/browse/HDFS-2617
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Jakob Homan


The current approach to secure and authenticate nn web services is based on 
Kerberized SSL and was developed when a SPNEGO solution wasn't available. Now 
that we have one, we can get rid of the non-standard KSSL and use SPNEGO 
throughout.  This will simplify setup and configuration.  Also, Kerberized SSL 
is a non-standard approach with its own quirks and dark corners (HDFS-2386).

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