pgsql: Update time zone data files to tzdata release 2009a: introduces

[tgl(at)postgresql(dot)org (Tom Lane)]

Log Message:
-----------
Update time zone data files to tzdata release 2009a: introduces Asia/Kathmandu
as the preferred spelling of that zone name, corrects historical DST
information for Switzerland and Cuba.

Tags:
----
REL8_2_STABLE

Modified Files:
--------------
    pgsql/src/timezone/data:
        asia (r1.6.2.7 -> r1.6.2.8)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/asia?r1=1.6.2.7&r2=1.6.2.8)
        backward (r1.4.2.3 -> r1.4.2.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/backward?r1=1.4.2.3&r2=1.4.2.4)
        europe (r1.6.2.4 -> r1.6.2.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/europe?r1=1.6.2.4&r2=1.6.2.5)
        northamerica (r1.6.2.6 -> r1.6.2.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/northamerica?r1=1.6.2.6&r2=1.6.2.7)
        zone.tab (r1.6.2.6 -> r1.6.2.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/zone.tab?r1=1.6.2.6&r2=1.6.2.7)