pgsql: Add: > > * Interpret INTERVAL '1:30' MINUTE TO SECOND as '1

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

* Interpret INTERVAL '1:30' MINUTE TO SECOND as '1 minute 30 seconds'

Modified Files:
--------------
pgsql/doc:
TODO (r1.1474 -> r1.1475)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1474&r2=1.1475)