Call the compat code and select the correct emulation mode.
Remove the string encoding support, since we have fixed inputs for the
title string.

which is convenient, since it is exactly what we need.

This makes it easier to see what is supported by each OS, and to improve
them individually.

I removed all of the code in fake-sensors, I don't think Henning wants
all the credit for an empty file.

Well, support may be too concrete of a term. There is a lot that is
missing in OS X, and not everything can be implemented with portability
shims. The time APIs in OS X seem to have frozen with NeXTSTEP and never
advanced with POSIX.

First attempt at building a new OpenNTPD portable project, based on the
latest OpenBSD source.