[OpenAFS] Changes for Mosaic's AFS cell...

[Derrick J Brashear]

> You might argue that these are really 3 different modes of operation and they 
> should belong in 3 different PAM modules.  But on some Linux systems at least 
> this is all done by a single PAM module that figures out which of those 3 
> things to do based on the situation.

What does Linux have to do with it? I had a module which worked on Linux 
and Solaris in 1998 or so... which handled all 3 cases, but did not honor 
env, though I suppose with the relevant checks you could avoid the attack 
I was concerned about... which at this point I no longer even remember the 
details of.