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)