MFC r256557 - kernel and userland osreldate helpers.


git-svn-id: svn+ssh://svn.freebsd.org/base/stable/6@261777 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
MFC of 263041, tzdata2014a:

- Fix historical info about asia/Zion, Ukraine
- Fiji starts DST at 02:00 instead of 03:00
- Turkey will move to DST at 31 March this year.


git-svn-id: svn+ssh://svn.freebsd.org/base/stable/6@263045 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f