pgsql-server: Add: > > * Consider automatic caching of queries at

Log Message:
-----------
Add:

* Consider automatic caching of queries at various levels:
o Parsed query tree
o Query execute plan
o Query results

Modified Files:
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pgsql-server/doc:
TODO (r1.1355 -> r1.1356)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/TODO.diff?r1=1.1355&r2=1.1356)