pgsql: Update timezone data to tzdata2006p zic distribution.

Log Message:
-----------
Update timezone data to tzdata2006p zic distribution.  It seems Western
Australia decided to institute DST with one month's notice ... way to go,
politicians.

Modified Files:
--------------
    pgsql/src/timezone/data:
        antarctica (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/antarctica.diff?r1=1.3&r2=1.4)
        asia (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/asia.diff?r1=1.5&r2=1.6)
        australasia (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/australasia.diff?r1=1.3&r2=1.4)
        northamerica (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/northamerica.diff?r1=1.5&r2=1.6)
        southamerica (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/southamerica.diff?r1=1.5&r2=1.6)
        zone.tab (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/zone.tab.diff?r1=1.5&r2=1.6)