SERVER-4148 reimplement findone and count using query optimizer cursor

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• Closed

SERVER-4149 reimplement update and delete using query optimizer cursor

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• Closed

SERVER-4150 reimplement query using query optimizer cursor

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• Closed

SERVER-4671 prefer indexes with equality match on a unique key

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• Closed

SERVER-665 special case simple queries for speed in qo

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• Closed