[Portland] xdg-utils proof of concept

[Jeremy White]

>>I went very fast and loose so I'm sure it has lots of problems,
>>but this at least demonstrates my thinking.

Just responding to my own email with some of the concerns
I have (I've really run out of time to work on this right now;
hopefully in a few days I'll get more).

First, this is almost completely untested; that worries me.
The xdg-su script, for example, has never been run.  I also worry
that I didn't look at the command line args for kdesu/gnomesu
and xsu, and that there may be a train wreck there I'm not aware of.

Along those lines, I think there needs to be some sort of test
mechanism put in place.  I'm not entirely sure what that should be,
as a lot of the testing needs user interaction (e.g. did a menu appear?).
I'm toying with using CxTest for that (www.cxtest.org), but that
may be overkill.

I also want to ping a few other ISV types I know to see what they
think of it (the Loki Setup guys in particular).

Cheers,

Jeremy