Update time zone data files to tzdata release 2023c.
DST law changes in Egypt, Greenland, Morocco, and Palestine.
When observing Moscow time, Europe/Kirov and Europe/Volgograd now
use the abbreviations MSK/MSD instead of numeric abbreviations,
for consistency with other timezones observing Moscow time.
Also, America/Yellowknife is no longer distinct from America/Edmonton;
this affects some pre-1948 timestamps in that area.
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/4ddee4d9de9ba90bfba5762f635fa21b6edfaf48
Modified Files
--------------
src/timezone/data/tzdata.zi | 132 ++++++++++++++++++++++++++++++++---------
src/timezone/known_abbrevs.txt | 3 +-
2 files changed, 106 insertions(+), 29 deletions(-)