Multiple Gnus running at the same time

[Stefan Monnier]

1 - Let's say I have a Gnus running somewhere for a long time and I forget
    about it.  Let's call it Gnus-1.
2 - Now I launch a new Emacs process, run Gnus in it (call it Gnus-2).
3 - Read some email and news in Gnus-2.
4 - quit Gnus-2.
5 - get hit by a truck and suddenly remember that there was
    a Gnus-1 running.
6 - read email and news with Gnus-1, including using `s' to save the state.

In step 6, things may look pretty odd (at least with imap folders, running
Emacs-CVS's version of Gnus, when entering a folder I see for example
entries in the summary for messages which aren't there any more), but at no
time will Gnus warn me about the fact that some other process has messed
with my .newsrc.eld file.

Given the behavior of Emacs in general when saving a file that was modified
by some external process, I'd expect that in step 6, when saving with `s',
Gnus should prompt me that the .newsrc.eld file has changed since
last visited.


        Stefan