Default desktop configuration XFCE 4.12 (Ubuntu 16.04)

Migrating my standard "teaching room" build of Ubuntu (with the xubuntu package installed, so possibly I should describe it as Xubuntu) from 14.04 to 16.04.  I've found several differences, including this one

The default desktop configuration file is no longer

 /etc/xdg/xfce4/xfconf/xfce-perchannel-xml/xfce4-desktop.xml

but is instead

 /etc/xdg/xdg-xubuntu/xfce4/xfconf/xfce-perchannel-xml/xfce4-desktop.xml

In order to provide every user with the same default desktop I copy in a version of the first file. Under 16.04 the user's background is the default XFCE wallpaper.  So now I copy in the second file and everything is as it was.

Oh, not another blog, surely?

Yes, I'm afraid so.

Why?  Because as I'm working on "technical" things I keep finding that what I'm trying to do isn't exactly the same as what others who went before me have done, so it occurred to me that documenting successful solutions to problems might help those who come after.

It might help me remember what those solutions were too, come to that.

There's nothing here yet; the cup of coffee I just drank gave me time to set the blog up, but I've got other things I must do right now.