. Report when the time zone data is being updated.
. Error if the time zone update fails. This is a bit of a double edged
sword. It prevents installing a broken port with a broken packing list
if Diablo won't run on this version of FreeBSD, but it also creates a
situation where the install can fail without really needing to if you
have to retry it for some reason (e.g. you forget the root password when
installing as a user). If the latter is the case, you'll need to first
clean to before trying to install again to resolve the issue.
Making pre-install somewhat bogusly pre-install or checking for the
existence of an updated time zone file before running tzupdate may
alleviate the problem with this solution.