pgsql: Add items: < * Add transaction_timestamp(),

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

< * Add transaction_timestamp(), statement_timestamp(), clock_timestamp() functionality

* Add transaction_timestamp(), statement_timestamp(), clock_timestamp()
functionality

278c279
< one column

one column or expression indexes, perhaps using per=index statistics

846a848

* Remove kerberos4 from source tree?

Modified Files:
--------------
pgsql/doc:
TODO (r1.1381 -> r1.1382)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1381&amp;r2=1.1382)