pgsql: Add description: < * Prevent libpq's PQfnumber() from

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

< * Prevent libpq's PQfnumber() from lowercasing the column name?

* Prevent libpq's PQfnumber() from lowercasing the column name

One idea is to lowercase all identifiers except those that are
surrounded by quotes.

Modified Files:
--------------
pgsql/doc:
TODO (r1.1684 -> r1.1685)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1684&amp;r2=1.1685)
pgsql/doc/src/FAQ:
TODO.html (r1.191 -> r1.192)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.191&amp;r2=1.192)