pgsql: Add: > > * Fix self-referential UPDATEs seeing inconsistent row

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

* Fix self-referential UPDATEs seeing inconsistent row versions in
read-committed mode

http://archives.postgresql.org/pgsql-hackers/2007-05/msg00507.php

Modified Files:
--------------
pgsql/doc:
TODO (r1.2189 -> r1.2190)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.2189&r2=1.2190)
pgsql/doc/src/FAQ:
TODO.html (r1.690 -> r1.691)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.690&r2=1.691)