pgsql: Add: > * Allow statistics collector information to be pulled

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

* Allow statistics collector information to be pulled from the collector
process directly, rather than requiring the collector to write a
filesystem file twice a second?

Modified Files:
--------------
pgsql/doc:
TODO (r1.1754 -> r1.1755)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1754&r2=1.1755)
pgsql/doc/src/FAQ:
TODO.html (r1.259 -> r1.260)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.259&r2=1.260)