Sync zoneinfo database with tzdata2014j from ftp://ftp.iana.org/tz/releases

* Turks & Caicos' switch from US eastern time to UTC-4 year-round
    did not occur on 2014-11-02 at 02:00.  It's currently scheduled
    for 2015-11-01 at 02:00.  (Thanks to Chris Walton.)

* Many corrections to pre-1989 time stamps of Asia/Seoul and
    Asia/Pyongyang.

* Change various zones into links where they differ only in pre-1970
    time stamps.

* Miscenallenous commentary adjustments.
nrelease/rconfig: Remove some usbd(8) remains.
boot/loader: Autoload XHCI support (xhci.ko).

This should help with issues people were having when trying to
boot a DragonFly USB IMG from a thumb drive plugged into a
USB 3 port.