Note:
-----
Support for accessing posix/ and right/ directly has been dropped to
match upstream. There is no need to set TIMEZONE=posix/xxx as it is the
same as TIMEZONE=xxx in /etc/rc.conf.
For TIMEZONE=right/, you can use TIMEZONE=../zoneinfo-leaps/xxx instead.
See this post for details:
https://mm.icann.org/pipermail/tz/2015-February/022024.html