This looks like a big change but really isn't.

It is changing the global variables "myname" and "myworkgroup"
to "global_myname" and "global_myworkgroup" respectively.

This is to make it very explicit when we are messing
with a global (don't ask - it makes the domain client
code much clearer :-).

Jeremy.
(This used to be commit 866406bfe399cf757c8275093dacd5ce4843afa0)