Zero-copy implementation of wrapped buffer interface
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                 Key: AVRO-921
                 URL: https://issues.apache.org/jira/browse/AVRO-921
             Project: Avro
          Issue Type: New Feature
          Components: c
    Affects Versions: 1.6.0
            Reporter: Douglas Creager
            Assignee: Douglas Creager


The {{avro_wrapped_buffer_t}} is used by the bytes and string types to store 
the content of the Avro value.  The wrapped buffer interface is capable of 
being zero-copy, where the underlying content buffer is shared across multiple 
Avro values.  But our default implementation would create a new physical copy 
of the data every time the {{copy}} method is called.  It would be good to have 
a default zero-copy implementation.

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