tzdb Release 2022c

Changelog (from NEWS)

Briefly:
    Work around awk bug in FreeBSD, macOS, etc.
    Improve tzselect on intercontinental Zones.

  Changes to code

    Work around a bug in onetrueawk that broke commands like
    'make traditional_tarballs' on FreeBSD, macOS, etc.
    (Problem reported by Deborah Goldsmith.)

    Add code to tzselect that uses experimental structured comments in
    zone1970.tab to clarify whether Zones like Africa/Abidjan and
    Europe/Istanbul cross continent or ocean boundaries.
    (Inspired by a problem reported by Peter Krefting.)

    Fix bug with 'zic -d /a/b/c' when /a is unwritable but the
    directory /a/b already exists.

    Remove zoneinfo2tdf.pl, as it was unused and triggered false
    malware alarms on some email servers.