tzdb Release 2018g

Changelog (from NEWS)

Briefly:
    Morocco switches to permanent +01 on 2018-10-28.

  Changes to future timestamps

    Morocco switches from +00/+01 to permanent +01 effective 2018-10-28,
    so its clocks will not fall back as previously scheduled.
    (Thanks to Mohamed Essedik Najd and Brian Inglis.)

  Changes to code

    When generating TZif files with leap seconds, zic no longer uses a
    format that trips up older 32-bit clients, fixing a bug introduced
    in 2018f.  (Reported by Daniel Fischer.)  Also, the zic workaround
    for QTBUG-53071 now also works for TZif files with leap seconds.

    The translator to rearguard format now rewrites the line
    "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to
    "Rule Japan 1948 1951 - Sep Sun>=9  1:00 0 S".
    This caters to zic before 2007 and to Oracle TZUpdater 2.2.0
    and earlier.  (Reported by Christos Zoulas.)

  Changes to past time zone abbreviations

    Change HDT to HWT/HPT for WWII-era abbreviations in Hawaii.
    This reverts to 2011h, as the abbreviation change in 2011i was
    likely inadvertent.

  Changes to documentation

    tzfile.5 has new sections on interoperability issues.