[tz] Magallanes region from Chile will keep DST all year round

[Paul Eggert]

On 01/23/2017 03:55 PM, Deborah Goldsmith wrote:
> This also requires getting the ICU team to release updated metazone data for an unreleased IANA snapshot. This is a lot of work on multiple people’s parts to save having to turn the crank on a TZ release.

Many different cranks have to be turned whenever a new TZ release is
made, not only by IANA but also by downstream developers and
distributors. Surely this is more work overall than a one-time minor
change to ICU's procedure so that they can base their effort on tz
snapshot Y instead of release X.