pgsql: Add: < * -Eventually enable escape_string_warning and

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

< * -Eventually enable escape_string_warning and standard_conforming_strings

* -Enable escape_string_warning and standard_conforming_strings
* Make standard_conforming_strings the default in 8.3?

When this is done, backslash-quote should be prohibited in non-E''
strings because of possible confusion over how such strings treat
backslashes. Basically, '' is always safe for a literal single
quote, while \' might or might not be based on the backslash
handling rules.

Modified Files:
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pgsql/doc:
TODO (r1.1804 -> r1.1805)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1804&amp;r2=1.1805)
pgsql/doc/src/FAQ:
TODO.html (r1.308 -> r1.309)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.308&amp;r2=1.309)