pgsql-server: Add: > * Allow finer control over the caching of prepared

Log Message:
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Add:

* Allow finer control over the caching of prepared query plans

Currently, queries prepared via the libpq API are planned on first
execute using the supplied parameters --- allow SQL PREPARE to do the
same. Also, allow control over replanning prepared queries either
manually or automatically when statistics for execute parameters
differ dramatically from those used during planning.

Modified Files:
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pgsql-server/doc:
TODO (r1.1326 -> r1.1327)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/TODO.diff?r1=1.1326&r2=1.1327)