[OpenAFS-port-darwin] gui Mount_AFS update

[David Botsch]

in concert with the patch I mentioned yesterday, I've slightly updated 
the gui Mount_AFS.

1. checks for /Network/afs to exist. If not, creates it.
2. Marks /Network/afs as not ejectable, so that it doesn't get ejected 
when you log out.

http://cf.ccmr.cornell.edu/publicdownloads/afs

-- 
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David William Botsch
Consultant/Advisor II
CCMR Computing Facility
dwb7@ccmr.cornell.edu
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