MFV of r270725, tzdata2014f

- Russia time zone changes.
- New zones: Asia/Chita and Asia/Srednekolymsk.
- Lots of changes wrt. time zone abbreviations and historical data.
- New zone tab data format.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270728 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Fix comments on updating tzdata releases.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270729 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f