pgsql: Allow timezone names in SQL strings, '2006-05-24 21:11

Log Message:
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Allow timezone names in SQL strings,

'2006-05-24 21:11 Americas/New_York'::timestamptz

Joachim Wieland

Modified Files:
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pgsql/src/backend/utils/adt:
datetime.c (r1.166 -> r1.167)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c.diff?r1=1.166&r2=1.167)