preserve my changes to the fentonups driver, allowing the detection logic
to be bypassed and a model to be forced - for UPSes that do implement the
protocol except the identification command, which seems to be somewhat common
the Xanto S3000R thing here behaves like that, and support for it is added
ok mbalmer
In addition to the standard bugfixes, this is a major port rewrite.
The port now uses a '_ups' user and the CGIs created can now run under
either chrooted Apache or non-chrooted Apache.
