Sync zoneinfo database with tzdata2016h from ftp://ftp.iana.org/tz/releases

Sync zoneinfo database with tzdata2016h from ftp://ftp.iana.org/tz/releases

* Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not
    2016-10-21 at 00:00.  (Thanks to Sharef Mustafa.)  Predict that
    future fall transitions will be on the last Saturday of October
    at 01:00, which is consistent with predicted spring transitions
    on the last Saturday of March.  (Thanks to Tim Parenti.)

* In Turkey, transitions in 1986-1990 were at 01:00 standard time
    not at 02:00, and the spring 1994 transition was on March 20, not
    March 27.  (Thanks to Kıvanç Yazan.)

* Asia/Colombo now uses numeric time zone abbreviations like "+0530"
    instead of alphabetic ones like "IST" and "LKT".  Various
    English-language sources use "IST", "LKT" and "SLST", with no
    working consensus.  (Usage of "SLST" mentioned by Sadika
    Sumanapala.)

* The 'Theory' file now has a section on interface stability.
    (Requested by Paul Koning.)  It also mentions features like
    tm_zone and localtime_rz that have long been supported by the
    reference code.

* The US commentary now mentions Allen and the "day of two noons".

* The Fiji commentary mentions the government's 2016-10-03 press
    release.  (Thanks to Raymond Kumar.)