Other tz file readers had problems with the new pre1970 file, so
remove it and related changes. To recover the pre-1970 data,
instead change pre-1970 Zone entries in other files back to what
they were. Perhaps we'll try to find a better way someday.
* .gitignore: Remove back-pre1970.
* Makefile (BACKWARD): Remove. All uses changed back to 'backward'.
(AWK_SCRIPTS): Remove back-pre1970.awk.
(back-pre1970): Remove.
(clean_misc): Don't rm back-pre1970.
(check_public): Remove special case for pre1970.
* back-pre1970.awk, pre1970: Remove.
* backward (America/Anguilla, America/Antigua, America/Aruba)
(America/Atikokan, America/Blanc-Sablon, America/Cayman)
(America/Creston, America/Curacao, America/Dominica, America/Grenada)
(America/Guadeloupe, America/Montreal, America/Montserrat)
(America/Nassau, America/Port_of_Spain, America/St_Kitts)
(America/St_Lucia, America/St_Thomas, America/St_Vincent)
(America/Tortola): Remove, as these are zones again.
(America/Coral_Harbour, America/Kralendijk, America/Lower_Princes)
(America/Marigot, America/St_Barthelemy, America/Virgin):
Revert to previous links.
* northamerica (Mont, America/Blanc-Sablon, America/Montreal)
(America/Atikokan, America/Creston, America/Anguilla, America/Antigua)
(Bahamas, America/Nassau, America/Cayman, America/Dominica)
(America/Grenada, America/Guadeloupe, America/Montserrat)
(America/St_Kitts, America/St_Lucia, America/St_Vincent)
(America/Tortola, America/St_Thomas):
* southamerica (America/Aruba, America/Curacao, America/Port_of_Spain):
Restore these rules and zones.
* .gitignore: Add back-pre1970.
This is like the previous change, except it entails a change to zone.tab.
The America/Montreal entry was created only because we mistakenly
thought that Montreal's and Toronto's post-1970 time stamps differed.
* backward, northamerica (America/Montreal):
Now a 'backward' link to America/Toronto.
* northamerica (Mont): Remove rules; no longer needed.
(America/Thunder_Bay): Refer to Toronto rules, not Mont.
This doesn't change any time stamps.
* zone.tab (America/Montreal): Remove.
(America/Toronto): Say that it also covers most of Quebec.
This continues in the series of moving entries to 'backward' if
they exist only because of obsolete tz rules about country codes.
In this case, Zone entries are changed to Links; this doesn't
affect any post-1970 time stamps, and the pre-1970 time stamps
are out of scope and are often of dubious reliability.
* backward, northamerica, southamerica (America/Anguilla)
(America/Antigua, America/Aruba, America/Blanc-Sablon)
(America/Cayman, America/Curacao, America/Dominica)
(America/Grenada, America/Guadeloupe, America/Montserrat)
(America/Port_of_Spain, America/St_Kitts, America/St_Lucia)
(America/St_Thomas, America/St_Vincent, America/Tortola):
Now 'backward' links to America/Puerto_Rico.
(America/Atikokan): Now a 'backward' link to America/Panama.
(America/Creston): Now a 'backward' link to America/Phoenix.
(America/Nassau): Now a 'backward' link to America/Toronto.
* backward (America/Coral_Harbour, America/Kralendijk)
(America/Lower_Princes, America/Marigot, America/St_Barthelemy)
(America/Virgin): Adjust to avoid link-to-a-link.
This fixes the 2013-08-15 change so that 'make check' works again.
* backward (America/Shiprock): Move this link here....
* northamerica (America/Shiprock): ... to here.
This continues in the series of moving entries to 'backward' if
they exist only because of obsolete tz rules about country codes.
This change does not affect any time stamps after 1970. Unlike
the previous change in this series, this one does affect time
stamps before 1970, but that's OK as pre-1970 time stamps are
out of scope for the tz database.
* antarctica (Antarctica/McMurdo, Antarctica/South_Pole):
Move to 'backward' and link to Pacific/Auckland.
* backward: Move links here from 'antarctica'.
* zone.tab: Coalesce McMurdo and South Pole, and add Scott Base
to the description.
* backward: Move links here from other files, if the only reason
they existed was to fill out zone.tab. Zones are now allowed to
cross national borders, so a zone now need not exist merely
because there's a national border. Sort the list consistently.
None of this changes any time stamp in the database.
* checktab.awk: Don't require that zone.tab's column 3 be unique.
* europe (Europe/Jersey, Europe/Guernsey, Europe/Isle_of_Man)
(Europe/Mariehamn, Europe/Busingen, Europe/Vatican, Europe/San_Marino)
(Arctic/Longyearbyen, Europe/Ljubljana, Europe/Podgorica)
(Europe/Sarajevo, Europe/Skopje, Europe/Zagreb, Europe/Bratislava):
* northamerica (America/St_Barthelemy, America/Marigot):
* southamerica (America/Lower_Princes, America/Kralendijk):
Move links to 'backward'.
* zone.tab: Give more details about how different rows can have
duplicate column 1 or column 3. For each link moved to 'backward',
change column 3 to be the non-backward name.
