pgsql: Add: > > * Consider adding buffers the BGW finds reusable to

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

* Consider adding buffers the BGW finds reusable to the free list

http://archives.postgresql.org/pgsql-hackers/2007-04/msg00781.php

* Automatically tune bgwriter_delay based on activity rather then using a
fixed interval

http://archives.postgresql.org/pgsql-hackers/2007-04/msg00781.php

Modified Files:
--------------
pgsql/doc:
TODO (r1.2287 -> r1.2288)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/TODO?r1=1.2287&r2=1.2288)
pgsql/doc/src/FAQ:
TODO.html (r1.796 -> r1.797)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html?r1=1.796&r2=1.797)