pgsql: Turns out our existing page size is already optimal in most

Log Message:
-----------
Turns out our existing page size is already optimal in most cases:

< * Research the use of larger page sizes

Modified Files:
--------------
pgsql/doc:
TODO (r1.1512 -> r1.1513)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1512&amp;r2=1.1513)
pgsql/doc/src/FAQ:
TODO.html (r1.19 -> r1.20)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.19&amp;r2=1.20)