pgsql: Update wording: o Research self-referential UPDATEs that

Log Message:
-----------
Update wording:

o Research self-referential UPDATEs that see inconsistent row versions
in read-committed mode

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

Modified Files:
--------------
pgsql/doc:
TODO (r1.2195 -> r1.2196)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.2195&r2=1.2196)
pgsql/doc/src/FAQ:
TODO.html (r1.696 -> r1.697)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.696&r2=1.697)