Ali Beyad 592f5499cd More robust handling of CORS HTTP Access Control
Uses a refactored version of Netty's CORS implementation to provide more
robust cross-origin resource request functionality.  The CORS specific
Elasticsearch parameters remain the same, just the underlying
implementation has changed.

It has also been refactored in a way that allows dropping in Netty's
CORS handler as a replacement once Elasticsearch is upgraded to Netty 4.
2016-02-03 14:50:20 -05:00
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