Pull up following revision(s) (requested by kre in ticket #333):
doc/3RDPARTY: 1.1479
distrib/sets/lists/base/mi: 1.1164
external/public-domain/tz/dist/CONTRIBUTING: up to 1.1.1.4
external/public-domain/tz/dist/LICENSE: up to 1.1.1.3
external/public-domain/tz/dist/Makefile: up to 1.1.1.18
external/public-domain/tz/dist/NEWS: up to 1.1.1.19
external/public-domain/tz/dist/TZDATA_VERSION: up to 1.9
external/public-domain/tz/dist/Theory: delete
external/public-domain/tz/dist/africa: up to 1.1.1.12
external/public-domain/tz/dist/antarctica: up to 1.1.1.9
external/public-domain/tz/dist/asia: up to 1.1.1.17
external/public-domain/tz/dist/australasia: up to 1.1.1.12
external/public-domain/tz/dist/backward: up to 1.1.1.8
external/public-domain/tz/dist/backzone: up to 1.1.1.12
external/public-domain/tz/dist/calendars: up to 1.1.1.1
external/public-domain/tz/dist/checklinks.awk: up to 1.1.1.3
external/public-domain/tz/dist/europe: up to 1.1.1.18
external/public-domain/tz/dist/leap-seconds.list: up to 1.1.1.8
external/public-domain/tz/dist/leapseconds: up to 1.1.1.9
external/public-domain/tz/dist/leapseconds.awk: up to 1.1.1.6
external/public-domain/tz/dist/northamerica: up to 1.1.1.17
external/public-domain/tz/dist/southamerica: up to 1.1.1.12
external/public-domain/tz/dist/theory.html: up to 1.1.1.1
external/public-domain/tz/dist/version: up to 1.1.1.6
external/public-domain/tz/dist/zishrink.awk: up to 1.1.1.1
external/public-domain/tz/dist/zone.tab: up to 1.1.1.12
external/public-domain/tz/dist/zone1970.tab: up to 1.1.1.14
Update tzdata to 2017c.

(snj)