Log Message:
-----------
Insert ARST into the list of known timezone abbreviations.
Tags:
----
REL8_1_STABLE
Modified Files:
--------------
pgsql/src/backend/utils/adt:
datetime.c (r1.160.2.3 -> r1.160.2.4)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c?r1=1.160.2.3&r2=1.160.2.4)