Tighten up join ordering rules to account for recent more-careful analysis

Tom Lane <tgl@sss.pgh.pa.us>

Commit: 75c85bd1997f6fba1cb9cdf0fa48fab220b0e745
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2009-02-27T22:41:38Z
Releases: 8.4.0
Tighten up join ordering rules to account for recent more-careful analysis
of the associativity of antijoins.  Also improve optimizer/README discussion
of outer join ordering rules.

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