Log Message:
-----------
Repair two TIME WITH TIME ZONE bugs found by Dennis Vshivkov. Comparison
of timetz values misbehaved in --enable-integer-datetime cases, and
EXTRACT(EPOCH) subtracted the zone instead of adding it in all cases.
Backpatch to all supported releases (except --enable-integer-datetime code
does not exist in 7.2).
Modified Files:
--------------
pgsql/src/backend/utils/adt:
date.c (r1.104 -> r1.105)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/date.c.diff?r1=1.104&r2=1.105)