Fixes for minor oversights re: Russian changes on 2014-10-26.

* europe: (Europe/Samara): Prefer MSK/MSD for Moscow time and EET/EEST for
Eastern European time.
(Asia/Srednekolymsk): Fix incorrect link in commentary.
* zone.tab (Asia/Chita): Mention that the Moscow offset changes 2014-10-26.
* zic.8, NEWS: Clarify use of time types in rule lines.

(Thanks to Arthur David Olson.)