(tz) Support tzdata2014i

The 2014i release of the tz code and data is available. It reflects the
following changes, which were either circulated on the tz mailing list
or are relatively minor technical or administrative changes:

   Changes affecting future time stamps

     Pacific/Fiji will observe DST from 2014-11-02 02:00 to
     2015-01-18 03:00. (Thanks to Ken Rylander for the heads-up.)
     Guess that future years will use a similar pattern.

     A new Zone Pacific/Bougainville, for the part of Papua New
     Guinea that plans to switch from UTC+10 to UTC+11 on
     2014-12-28 at 02:00. (Thanks to Kiley Walbom for the
     heads-up.)

   Changes affecting time zone abbreviations

     Since Belarus is not changing its clocks even though Moscow
     is, the time zone abbreviation in Europe/Minsk is changing
     from FET to its more-traditional value MSK on 2014-10-26 at
     01:00. (Thanks to Alexander Bokovoy for the heads-up about
     Belarus.)

     The new abbreviation IDT stands for the pre-1976 use of UT+8
     in Indochina, to distinguish it better from ICT (UT+7).

   Changes affecting past time stamps

     Many time stamps have been corrected for Asia/Ho_Chi_Minh
     before 1976 (thanks to Trần Ngọc Quân for an indirect pointer
     to Trần Tiến Bình's authoritative book). Asia/Ho_Chi_Minh has
     been added to zone1970.tab, to give tzselect users in Vietnam
     two choices, since north and south Vietnam disagreed after our
     1970 cutoff.

     Asia/Phnom_Penh and Asia/Vientiane have been turned into
     links, as they differed from existing zones only for older
     time stamps. As usual, these changes affect pre-1970 time
     stamps only. Their old contents have been moved to the
     'backzone' file.

   Changes affecting code

     The time-related library functions now set errno on failure,
     and some crashes in the new tzalloc-related library functions
     have been fixed. (Thanks to Christos Zoulas for reporting
     most of these problems and for suggesting fixes.)

     If USG_COMPAT is defined and the requested time stamp is
     standard time, the tz library's localtime and mktime functions
     now set the extern variable timezone to a value appropriate
     for that time stamp; and similarly for ALTZONE, daylight
     saving time, and the altzone variable. This change is a
     companion to the tzname change in 2014h, and is designed to
     make timezone and altzone more compatible with tzname.

     The tz library's functions now set errno to EOVERFLOW if they
     fail because the result cannot be represented. ctime and
     ctime_r now return NULL and set errno when a time stamp is out
     of range, rather than having undefined behavior.

     Some bugs associated with the new 2014g functions have been
     fixed. This includes a bug that largely incapacitated the new
     functions time2posix_z and posix2time_z. (Thanks to Christos
     Zoulas.) It also includes some uses of uninitialized
     variables after tzalloc. The new code uses the standard type
     'ssize_t', which the Makefile now gives porting advice about.

   Changes affecting commentary

     Updated URLs for NRC Canada (thanks to Matt Johnson and Brian
     Inglis).

Here are links to the release files:

   ftp://ftp.iana.org/tz/releases/tzcode2014i.tar.gz
   ftp://ftp.iana.org/tz/releases/tzdata2014i.tar.gz

The files are also available via HTTP as follows:

http://www.iana.org/time-zones/repository/releases/tzcode2014i.tar.gz
http://www.iana.org/time-zones/repository/releases/tzdata2014i.tar.gz

The 2014h release of the tz code and data is available. It reflects the following changes, which were either circulated on the tz mailing list or are relatively minor technical or administrative changes:

  Changes affecting past time stamps

    America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.

    Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
    not 1920-01-06. The old entry was based on a misinterpretation of Shanks.

    Some more zones have been turned into links, when they differed
    from existing zones only for older time stamps. As usual,
    these changes affect UTC offsets in pre-1970 time stamps only.
    Their old contents have been moved to the 'backzone' file.
    The affected zones are: Africa/Blantyre, Africa/Bujumbura,
    Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
    Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.

  Changes affecting code

    zdump -V and -v now output gmtoff= values on all platforms,
    not merely on platforms defining TM_GMTOFF.

    The tz library's localtime and mktime functions now set tzname to a value
    appropriate for the requested time stamp, and zdump now uses this
    on platforms not defining TM_ZONE, fixing a 2014g regression.
    (Thanks to Tim Parenti for reporting the problem.)

    The tz library no longer sets tzname if localtime or mktime fails.

    zdump -c no longer mishandles transitions near year boundaries.
    (Thanks to Tim Parenti for reporting the problem.)

    An access to uninitalized data has been fixed.
    (Thanks to Jörg Richter for reporting the problem.)

    When THREAD_SAFE is defined, the code ports to the C11 memory model.
    A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
    and two threads race to initialize data used by gmtime-like functions.
    (Thanks to Andy Heninger for reporting the problems.)

  Changes affecting build procedure

    'make check' now checks better for properly-sorted data.

  Changes affecting documentation and commentary

    zdump's gmtoff=N output is now documented, and its isdst=D output
    is now documented to possibly output D values other than 0 or 1.

    zdump -c's treatment of years is now documented to use the
    Gregorian calendar and Universal Time without leap seconds,
    and its behavior at cutoff boundaries is now documented better.
    (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.)

    Programs are now documented to use the proleptic Gregorian calendar.
    (Thanks to Alan Barrett for the suggestion.)

    Fractional-second GMT offsets have been documented for civil time
    in 19th-century Chennai, Jakarta, and New York.

Here are links to the release files:

  ftp://ftp.iana.org/tz/releases/tzcode2014h.tar.gz
  ftp://ftp.iana.org/tz/releases/tzdata2014h.tar.gz

The files are also available via HTTP as follows:

  http://www.iana.org/time-zones/repository/releases/tzcode2014h.tar.gz
  http://www.iana.org/time-zones/repository/releases/tzdata2014h.tar.gz