pgsql: Re-order item.

Log Message:
-----------
Re-order item.

* Auto-fill the free space map by scanning the buffer cache or by
checking pages written by the background writer

< * Auto-fill the free space map by scanning the buffer cache or by
< checking pages written by the background writer

Modified Files:
--------------
pgsql/doc:
TODO (r1.1565 -> r1.1566)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1565&amp;r2=1.1566)
pgsql/doc/src/FAQ:
TODO.html (r1.72 -> r1.73)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.72&amp;r2=1.73)