Arla /afs won't come up unless cache is first nuked.

[Werner Krebs]

Arla on my RedHat 5.2 box running 2.0.36 needs to have its cache
nuked or it won't come up properly (shows nothing when an 'ls' is
done in /afs). If arlad is killed and the cache is nuked, /afs
comes up fine the next time arlad is restarted.

This happens everytime the machine is rebooted, or arla is simply
sent a -TERM.

The solution is to put an rm -rf $CACHE in /etc/init.d/arla.

Cache building is fairly quick (unlike one installation of
commercial AFS, where it took over 15 minutes for 150 meg cache, and
nothing else could run or you risked a kernel panic), so this isn't that
big of a deal, and this makes arla reliable.