Export of internal Abseil changes

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9d120df9deffb80c2102ac5048bb18c0cf5b9506 by Derek Mauro <dmauro@google.com>:

Delete LTS.md

Update links to point to https://abseil.io/about/releases and
https://github.com/abseil/abseil-cpp/releases instead.

PiperOrigin-RevId: 350239792

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43790be723cc11169a559e25b2198ee07a63722c by Derek Mauro <dmauro@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 350188087
GitOrigin-RevId: 9d120df9deffb80c2102ac5048bb18c0cf5b9506
Change-Id: Ieb9bd31a3af06e64a3d49f8b233daafe7827f733

LTS.md

-# Long Term Support (LTS) Branches
-
-This repository contains periodic snapshots of the Abseil codebase that are
-Long Term Support (LTS) branches. An LTS branch allows you to use a known
-version of Abseil without interfering with other projects which may also, in
-turn, use Abseil. (For more information about our releases, see the
-[Abseil Release Management](https://abseil.io/about/releases) guide.)
-
-## LTS Branches
-
-The following lists LTS branches and the dates on which they have been released:
-
-* [LTS Branch December 18, 2018](https://github.com/abseil/abseil-cpp/tree/lts_2018_12_18/)
-* [LTS Branch June 20, 2018](https://github.com/abseil/abseil-cpp/tree/lts_2018_06_20/)
-* [LTS Branch August 8, 2019](https://github.com/abseil/abseil-cpp/tree/lts_2019_08_08/)
-* [LTS Branch February 25, 2020](https://github.com/abseil/abseil-cpp/tree/lts_2020_02_25/)

absl/time/internal/cctz/testdata/version

-2020d
+2020f

absl/time/internal/cctz/testdata/zoneinfo/zone1970.tab

@@ -63,8 +63,7 @@ AS,UM	-1416-17042	Pacific/Pago_Pago	Samoa, Midway
 AT	+4813+01620	Europe/Vienna
 AT	+4813+01620	Europe/Vienna
 AU	-3133+15905	Australia/Lord_Howe	Lord Howe Island
 AU	-3133+15905	Australia/Lord_Howe	Lord Howe Island
 AU	-5430+15857	Antarctica/Macquarie	Macquarie Island
 AU	-5430+15857	Antarctica/Macquarie	Macquarie Island
-AU	-4253+14719	Australia/Hobart	Tasmania (most areas)
-AU	-3956+14352	Australia/Currie	Tasmania (King Island)
+AU	-4253+14719	Australia/Hobart	Tasmania
 AU	-3749+14458	Australia/Melbourne	Victoria
 AU	-3749+14458	Australia/Melbourne	Victoria
 AU	-3352+15113	Australia/Sydney	New South Wales (most areas)
 AU	-3352+15113	Australia/Sydney	New South Wales (most areas)
 AU	-3157+14127	Australia/Broken_Hill	New South Wales (Yancowinna)
 AU	-3157+14127	Australia/Broken_Hill	New South Wales (Yancowinna)
@@ -127,9 +126,9 @@ CA	+682059-1334300	America/Inuvik	Mountain - NT (west)
 CA	+4906-11631	America/Creston	MST - BC (Creston)
 CA	+4906-11631	America/Creston	MST - BC (Creston)
 CA	+5946-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
 CA	+5946-12014	America/Dawson_Creek	MST - BC (Dawson Cr, Ft St John)
 CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
 CA	+5848-12242	America/Fort_Nelson	MST - BC (Ft Nelson)
+CA	+6043-13503	America/Whitehorse	MST - Yukon (east)
+CA	+6404-13925	America/Dawson	MST - Yukon (west)
 CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
 CA	+4916-12307	America/Vancouver	Pacific - BC (most areas)
-CA	+6043-13503	America/Whitehorse	Pacific - Yukon (east)
-CA	+6404-13925	America/Dawson	Pacific - Yukon (west)
 CC	-1210+09655	Indian/Cocos
 CC	-1210+09655	Indian/Cocos
 CH,DE,LI	+4723+00832	Europe/Zurich	Swiss time
 CH,DE,LI	+4723+00832	Europe/Zurich	Swiss time
 CI,BF,GM,GN,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
 CI,BF,GM,GN,ML,MR,SH,SL,SN,TG	+0519-00402	Africa/Abidjan
@@ -292,8 +291,8 @@ RU	+554521+0373704	Europe/Moscow	MSK+00 - Moscow area
 # Mention RU and UA alphabetically.  See "territorial claims" above.
 # Mention RU and UA alphabetically.  See "territorial claims" above.
 RU,UA	+4457+03406	Europe/Simferopol	Crimea
 RU,UA	+4457+03406	Europe/Simferopol	Crimea
 RU	+5836+04939	Europe/Kirov	MSK+00 - Kirov
 RU	+5836+04939	Europe/Kirov	MSK+00 - Kirov
+RU	+4844+04425	Europe/Volgograd	MSK+00 - Volgograd
 RU	+4621+04803	Europe/Astrakhan	MSK+01 - Astrakhan
 RU	+4621+04803	Europe/Astrakhan	MSK+01 - Astrakhan
-RU	+4844+04425	Europe/Volgograd	MSK+01 - Volgograd
 RU	+5134+04602	Europe/Saratov	MSK+01 - Saratov
 RU	+5134+04602	Europe/Saratov	MSK+01 - Saratov
 RU	+5420+04824	Europe/Ulyanovsk	MSK+01 - Ulyanovsk
 RU	+5420+04824	Europe/Ulyanovsk	MSK+01 - Ulyanovsk
 RU	+5312+05009	Europe/Samara	MSK+01 - Samara, Udmurtia
 RU	+5312+05009	Europe/Samara	MSK+01 - Samara, Udmurtia