pgsql: Add item: > o Store per-table autovacuum settings in

Log Message:
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Add item:

o Store per-table autovacuum settings in pg_class.reloptions.

http://archives.postgresql.org/pgsql-hackers/2007-02/msg01440.php
http://archives.postgresql.org/pgsql-hackers/2008-01/msg00724.php

Modified Files:
--------------
pgsql/doc:
TODO (r1.2276 -> r1.2277)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/TODO?r1=1.2276&r2=1.2277)
pgsql/doc/src/FAQ:
TODO.html (r1.785 -> r1.786)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html?r1=1.785&r2=1.786)