Rebase to tzdata-2023d
- Include time zone changes for Ittoqqortoormiit, Greenland
and Vostok, Antarctica.
- Update the expiration date for the leap-seconds.list file.
No new leap seconds were added.
- Rebase to tzdata-2017c
- Northern Cyprus will revert to using EQ rules on October 29, 2017.
- Sudan will switch from +03 to +02 on November 1, 2017.
- Tonga will not change it's clocks on Novemeber 5, 2017 ending it's
experiment with DST.
- Fiji DST will end on January 14, 2018 rather than January 21, 2018.
- Namibia - starting September 3, 2017 switches from +)1 with DST to
+02 all year. This change takes effect April 1, 2018.
- Turks & Caicos changes from -04 all year to -05 with US DST starting
on March 11, 2018. Effective change date is November 4, 2018.
- tzdata now includes two text versions of the time zone data - tzdata.zi
and leapseconds.
- Includes two patches to deal with build issues.
