pgsql: Mark item as complete, add another: < * Allow triggers to be

Log Message:
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Mark item as complete, add another:

< * Allow triggers to be disabled [trigger]

* -Allow triggers to be disabled [trigger]
* Allow triggers to be disabled in only the current session.

< Currently the only way to disable triggers is to modify the system
< tables.

This is currently possible by starting a multi-statement transaction,
modifying the system tables, performing the desired SQL, restoring the
system tables, and committing the transaction. ALTER TABLE ...
TRIGGER requires a table lock so it is not idea for this usage.

Modified Files:
--------------
pgsql/doc:
TODO (r1.1625 -> r1.1626)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1625&amp;r2=1.1626)
pgsql/doc/src/FAQ:
TODO.html (r1.132 -> r1.133)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.132&amp;r2=1.133)