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

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:
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REL8_0_STABLE

Modified Files:
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    pgsql/src/timezone/data:
        asia (r1.2.4.9 -> r1.2.4.10)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/asia?r1=1.2.4.9&r2=1.2.4.10)
        backward (r1.2.4.5 -> r1.2.4.6)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/backward?r1=1.2.4.5&r2=1.2.4.6)
        europe (r1.2.4.6 -> r1.2.4.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/europe?r1=1.2.4.6&r2=1.2.4.7)
        northamerica (r1.2.4.8 -> r1.2.4.9)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/northamerica?r1=1.2.4.8&r2=1.2.4.9)
        zone.tab (r1.2.4.8 -> r1.2.4.9)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/timezone/data/zone.tab?r1=1.2.4.8&r2=1.2.4.9)