urtwn.4: Use %O for now.
usbdi.9: Sync with FreeBSD.
Sync ums.4 and ukbd.4 with FreeBSD.
Sync zoneinfo database with tzdata2014a from ftp://ftp.iana.org/tz/releases

See https://github.com/eggert/tz/blob/master/NEWS for a list of
what changed. We were previously in sync with tzdata2013i.