Revert most of the recent alike-since-1970 changes

This reverts most proposed changes that merged all Zones agreeing
since 1970, as concerns were raised about doing too many of these
changes at once.  It does keeps some of these changes in the
interest of making tzdb more equitable one step at a time.
* NEWS: Mention this and adjust change announcement.
* africa (Indian/Reunion, Indian/Mahe):
* antarctica (Indian/Kerguelen, Antarctica/Vostok):
* asia (Asia/Brunei, Asia/Kuala_Lumpur):
* australasia (Indian/Christmas, Indian/Cocos, Pacific/Majuro)
(Pacific/Chuuk, Pacific/Pohnpei, Pacific/Funafuti, Pacific/Wake)
(Pacific/Wallis):
* europe (Europe/Copenhagen, Atlantic/Reykjavik)
(Europe/Luxembourg, Europe/Monaco, Europe/Amsterdam, Europe/Oslo)
(Europe/Stockholm):
Move these Zones (and associated Rules) back from ‘backzone’.
* backward, backzone, zone1970.tab: Adjust to match these moves.

NEWS

@@ -2,6 +2,14 @@ News for the tz database
 
 Unreleased, experimental changes
 
+  This release is prompted by recent announcements by Jordan and Samoa.
+  It incorporates many other changes that had accumulated since 2021a.
+  However, it omits most proposed changes that merged all Zones
+  agreeing since 1970, as concerns were raised about doing too many of
+  these changes at once.  It does keeps some of these changes in the
+  interest of making tzdb more equitable one step at a time; see
+  "Merge more location-based Zones" below.
+
   Changes to future timestamps
 
     Jordan now starts DST on February's last Thursday.
@@ -44,18 +52,22 @@ Unreleased, experimental changes
     (Thanks to P Chan, Michael Deckers, Alexander Krivenyshev and
     Alois Treindl.)
 
-    Merge location-based timezones whose timestamps agree since 1970,
-    as pre-1970 timestamps are out of scope.  This does not affect
+    Merge more location-based Zones whose timestamps agree since 1970,
+    as pre-1970 timestamps are out of scope.  This is part of a
+    process that has been ongoing since 2013.  This does not affect
     post-1970 timestamps, and timezone historians who build with 'make
     PACKRATDATA=backzone' should see no changes to pre-1970 timestamps.
     When merging, keep the most-populous location's data, and move
     data for other locations to 'backzone' with a backward
-    link in 'backward'.  For example, move Europe/Oslo data to
-    'backzone' with a link in 'backward' from Europe/Berlin because
+    link in 'backward'.  For example, move America/Creston data to
+    'backzone' with a link in 'backward' from America/Phoenix because
     the two timezones' timestamps agree since 1970; this change
-    affects some pre-1966 timestamps in Europe/Oslo because Berlin and
-    Oslo disagreed before 1966.  Affected entries range from
-    Africa/Accra to Pacific/Yap.
+    affects some pre-1968 timestamps in America/Creston because
+    Creston and Phoenix disagreed before 1968.  The affected Zones
+    are Africa/Accra, America/Atikokan, America/Blanc-Sablon,
+    America/Creston, America/Curacao, America/Nassau,
+    America/Port_of_Spain, Antarctica/DumontDUrville, and
+    Antarctica/Syowa.
 
   Changes to maintenance procedure
 

africa

@@ -1271,9 +1271,21 @@ Zone	Africa/Lagos	0:13:35 -	LMT	1905 Jul  1
 			1:00	-	WAT
 
 # Réunion
-# See Asia/Dubai.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone	Indian/Reunion	3:41:52 -	LMT	1911 Jun # Saint-Denis
+			4:00	-	+04
+#
+# Scattered Islands (Îles Éparses) administered from Réunion are as follows.
+# The following information about them is taken from
+# Îles Éparses (<http://www.outre-mer.gouv.fr/domtom/ile.htm>, 1997-07-22,
+# in French; no longer available as of 1999-08-17).
+# We have no info about their time zone histories.
 #
-# Crozet Islands also observes Réunion time; see the 'antarctica' file.
+# Bassas da India - uninhabited
+# Europa Island - inhabited from 1905 to 1910 by two families
+# Glorioso Is - inhabited until at least 1958
+# Juan de Nova - uninhabited
+# Tromelin - inhabited until at least 1958
 
 # Rwanda
 # See Africa/Maputo.
@@ -1317,7 +1329,28 @@ Zone	Africa/Sao_Tome	 0:26:56 -	LMT	1884
 # See Africa/Abidjan.
 
 # Seychelles
-# See Asia/Dubai.
+
+# From P Chan (2020-11-27):
+# Standard Time was adopted on 1907-01-01.
+#
+# Standard Time Ordinance (Chapter 237)
+# The Laws of Seychelles in Force on the 31st December, 1971, Vol. 6, p 571
+# https://books.google.com/books?id=efE-AQAAIAAJ&pg=PA571
+#
+# From Tim Parenti (2020-12-05):
+# A footnote on https://books.google.com/books?id=DYdDAQAAMAAJ&pg=PA1689
+# confirms that Ordinance No. 9 of 1906 "was brought into force on the 1st
+# January, 1907."
+
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone	Indian/Mahe	3:41:48 -	LMT	1907 Jan  1 # Victoria
+			4:00	-	+04
+# From Paul Eggert (2001-05-30):
+# Aldabra, Farquhar, and Desroches, originally dependencies of the
+# Seychelles, were transferred to the British Indian Ocean Territory
+# in 1965 and returned to Seychelles control in 1976.  We don't know
+# whether this affected their time zone, so omit this for now.
+# Possibly the islands were uninhabited.
 
 # Sierra Leone
 # See Africa/Abidjan.

antarctica

@@ -157,7 +157,9 @@ Zone Antarctica/Mawson	0	-	-00	1954 Feb 13
 # St Paul Island - near Amsterdam, uninhabited
 #	fishing stations operated variously 1819/1931
 #
-# Kerguelen - see Indian/Maldives.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone Indian/Kerguelen	0	-	-00	1950 # Port-aux-Français
+			5:00	-	+05
 #
 # year-round base in the main continent
 # Dumont d'Urville - see Pacific/Port_Moresby.
@@ -240,7 +242,31 @@ Zone Antarctica/Troll	0	-	-00	2005 Feb 12
 #	year-round from 1960/61 to 1992
 
 # Vostok, since 1957-12-16, temporarily closed 1994-02/1994-11
-# See Asia/Urumqi.
+# From Craig Mundell (1994-12-15):
+# http://quest.arc.nasa.gov/antarctica/QA/computers/Directions,Time,ZIP
+# Vostok, which is one of the Russian stations, is set on the same
+# time as Moscow, Russia.
+#
+# From Lee Hotz (2001-03-08):
+# I queried the folks at Columbia who spent the summer at Vostok and this is
+# what they had to say about time there:
+# "in the US Camp (East Camp) we have been on New Zealand (McMurdo)
+# time, which is 12 hours ahead of GMT. The Russian Station Vostok was
+# 6 hours behind that (although only 2 miles away, i.e. 6 hours ahead
+# of GMT). This is a time zone I think two hours east of Moscow. The
+# natural time zone is in between the two: 8 hours ahead of GMT."
+#
+# From Paul Eggert (2001-05-04):
+# This seems to be hopelessly confusing, so I asked Lee Hotz about it
+# in person.  He said that some Antarctic locations set their local
+# time so that noon is the warmest part of the day, and that this
+# changes during the year and does not necessarily correspond to mean
+# solar noon.  So the Vostok time might have been whatever the clocks
+# happened to be during their visit.  So we still don't really know what time
+# it is at Vostok.  But we'll guess +06.
+#
+Zone Antarctica/Vostok	0	-	-00	1957 Dec 16
+			6:00	-	+06
 
 # S Africa - year-round bases
 # Marion Island, -4653+03752

asia

@@ -255,7 +255,10 @@ Zone	Indian/Chagos	4:49:40	-	LMT	1907
 			6:00	-	+06
 
 # Brunei
-# See Asia/Kuching.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone	Asia/Brunei	7:39:40 -	LMT	1926 Mar # Bandar Seri Begawan
+			7:30	-	+0730	1933
+			8:00	-	+08
 
 # Burma / Myanmar
 
@@ -2740,8 +2743,20 @@ Zone	Asia/Beirut	2:22:00 -	LMT	1880
 Rule	NBorneo	1935	1941	-	Sep	14	0:00	0:20	-
 Rule	NBorneo	1935	1941	-	Dec	14	0:00	0	-
 #
-# For peninsular Malaysia see Asia/Singapore.
-#
+# peninsular Malaysia
+# taken from Mok Ly Yng (2003-10-30)
+# https://web.archive.org/web/20190822231045/http://www.math.nus.edu.sg/~mathelmr/teaching/timezone.html
+# This agrees with Singapore since 1905-06-01.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone Asia/Kuala_Lumpur	6:46:46 -	LMT	1901 Jan  1
+			6:55:25	-	SMT	1905 Jun  1 # Singapore M.T.
+			7:00	-	+07	1933 Jan  1
+			7:00	0:20	+0720	1936 Jan  1
+			7:20	-	+0720	1941 Sep  1
+			7:30	-	+0730	1942 Feb 16
+			9:00	-	+09	1945 Sep 12
+			7:30	-	+0730	1982 Jan  1
+			8:00	-	+08
 # Sabah & Sarawak
 # From Paul Eggert (2014-08-12):
 # The data entries here are mostly from Shanks & Pottenger, but the 1942, 1945

australasia

@@ -252,10 +252,16 @@ Zone Antarctica/Macquarie 0	-	-00	1899 Nov
 			10:00	AT	AE%sT
 
 # Christmas
-# See Asia/Bangkok.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone Indian/Christmas	7:02:52 -	LMT	1895 Feb
+			7:00	-	+07
 
 # Cocos (Keeling) Is
-# See Asia/Yangon.
+# These islands were ruled by the Ross family from about 1830 to 1978.
+# We don't know when standard time was introduced; for now, we guess 1900.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone	Indian/Cocos	6:27:40	-	LMT	1900
+			6:30	-	+0630
 
 
 # Fiji
@@ -470,8 +476,15 @@ Zone Pacific/Kiritimati	-10:29:20 -	LMT	1901
 # See Pacific/Guam.
 
 # Marshall Is
-# See Pacific/Tarawa for most locations.
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone Pacific/Majuro	 11:24:48 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1944 Jan 30
+			 11:00	-	+11	1969 Oct
+			 12:00	-	+12
 Zone Pacific/Kwajalein	 11:09:20 -	LMT	1901
 			 11:00	-	+11	1937
 			 10:00	-	+10	1941 Apr  1
@@ -481,9 +494,22 @@ Zone Pacific/Kwajalein	 11:09:20 -	LMT	1901
 			 12:00	-	+12
 
 # Micronesia
-# For Chuuk and Yap see Pacific/Port_Moresby.
-# For Pohnpei see Pacific/Guadalcanal.
 # Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone Pacific/Chuuk	-13:52:52 -	LMT	1844 Dec 31
+			 10:07:08 -	LMT	1901
+			 10:00	-	+10	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 10:00	-	+10
+Zone Pacific/Pohnpei	-13:27:08 -	LMT	1844 Dec 31	# Kolonia
+			 10:32:52 -	LMT	1901
+			 11:00	-	+11	1914 Oct
+			  9:00	-	+09	1919 Feb  1
+			 11:00	-	+11	1937
+			 10:00	-	+10	1941 Apr  1
+			  9:00	-	+09	1945 Aug
+			 11:00	-	+11
 Zone Pacific/Kosrae	-13:08:04 -	LMT	1844 Dec 31
 			 10:51:56 -	LMT	1901
 			 11:00	-	+11	1914 Oct
@@ -816,7 +842,9 @@ Zone Pacific/Tongatapu	12:19:12 -	LMT	1945 Sep 10
 			13:00	Tonga	+13/+14
 
 # Tuvalu
-# See Pacific/Tarawa.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone Pacific/Funafuti	11:56:52 -	LMT	1901
+			12:00	-	+12
 
 
 # US minor outlying islands
@@ -875,7 +903,9 @@ Zone Pacific/Tongatapu	12:19:12 -	LMT	1945 Sep 10
 # uninhabited since World War II; was probably like Pacific/Kiritimati
 
 # Wake
-# See Pacific/Tarawa.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone	Pacific/Wake	11:06:28 -	LMT	1901
+			12:00	-	+12
 
 
 # Vanuatu
@@ -914,7 +944,9 @@ Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13 # Vila
 			11:00	Vanuatu	+11/+12
 
 # Wallis and Futuna
-# See Pacific/Tarawa.
+# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
+Zone	Pacific/Wallis	12:15:20 -	LMT	1901
+			12:00	-	+12
 
 ###############################################################################
 
@@ -1831,6 +1863,13 @@ Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13 # Vila
 # Like the Ladrones (see Guam commentary), assume the Spanish East Indies
 # kept American time until the Philippines switched at the end of 1844.
 
+# Alan Eugene Davis writes (1996-03-16),
+# "I am certain, having lived there for the past decade, that 'Truk'
+# (now properly known as Chuuk) ... is in the time zone GMT+10."
+#
+# Shanks & Pottenger write that Truk switched from UT +10 to +11
+# on 1978-10-01; ignore this for now.
+
 # From Paul Eggert (1999-10-29):
 # The Federated States of Micronesia Visitors Board writes in
 # The Federated States of Micronesia - Visitor Information (1999-01-26)
@@ -2169,6 +2208,26 @@ Zone	Pacific/Efate	11:13:16 -	LMT	1912 Jan 13 # Vila
 # For now, guess that DST is discontinued.  That's what the IATA is guessing.
 
 
+# Wake
+
+# From Vernice Anderson, Personal Secretary to Philip Jessup,
+# US Ambassador At Large (oral history interview, 1971-02-02):
+#
+# Saturday, the 14th [of October, 1950] - ...  The time was all the
+# more confusing at that point, because we had crossed the
+# International Date Line, thus getting two Sundays.  Furthermore, we
+# discovered that Wake Island had two hours of daylight saving time
+# making calculation of time in Washington difficult if not almost
+# impossible.
+#
+# https://www.trumanlibrary.org/oralhist/andrsonv.htm
+
+# From Paul Eggert (2003-03-23):
+# We have no other report of DST in Wake Island, so omit this info for now.
+
+# See also the commentary for Micronesia.
+
+
 ###############################################################################
 
 # The International Date Line