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(parent: 7c8d7a2) | patch

Remove the old advice to keep from_collapse_limit less than geqo_threshold,

Remove the old advice to keep from_collapse_limit less than geqo_threshold,
instead just pointing out that a larger value may trigger use of GEQO.
Per Robert Haas.

In passing, do a bit of wordsmithing on the Genetic Query Optimizer section.

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