Log Message:
-----------
Add:
> * Auto-vacuum
> o Move into the backend code
> o Scan the buffer cache to find free space or use background writer
> o Use free-space map information to guide refilling
Modified Files:
--------------
pgsql/doc:
TODO (r1.1401 -> r1.1402)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1401&r2=1.1402)