Sync zoneinfo database with tzdata2012a from munnari.oz.au

Sync zoneinfo database with tzdata2012a from munnari.oz.au

antarctica:     8.9  -> 8.10
asia:           8.69 -> 8.70
australasia:    8.29 -> 8.30
europe:         8.40 -> 8.41
leapseconds:    8.11 -> 8.13
northamerica:   8.51 -> 8.52
README:         8.3  -> 8.4
southamerica:   8.52 -> 8.53
zone.tab:       8.52 -> 8.54

* antarctica: Current best known timezone info for various Antarctic
    bases for the winter of 2012.

* asia: Armenia has abolished summer time.

* australasia: Tokelau copied Samoa and swapped sides of the
    International Date Line last December (affects current timestams).

* europe: Updated URL for UK timezone history.

* leapseconds: Bulletin C43 incorporated (a leap Second will occur
    2012-06-30 at 23:59:60 UTC). Bulletin C42 was also incorporated
    (but never released) - it said nothing very interesting (no leap
    second 2011-12-31).

* northamerica: New zone America/Creston created for an area in
    British Columbia that was previously (and apparently incorrectly)
    considered identical to Dawson Creek. Also, some corrections to
    1918 summer time end dates in several Canadian zones.

* README: Updated to reflect the current home of the mailing list and
    files.

* southamerica: Chile has extended Summer time in the 2011/2 summer.
    Future years (2013->) are assumed revert to "normal" for now. The
    Falkland Islands now have it permanently (continuing the 2011
    experiment). This "permanently" is a guess, it apparently is
    certain for 2012 (as certain as these things ever are) and
    considered likely into the future.

* zone.tab: New America/Creston zone added, and a typo in the entry
    for Europe/Samara corrected.