[BusyBox] modprobe

[Brad Campbell]

This is with current cvs

Modprobe supports the -q flag but insmod does not, thus a modprobe -q
silently fails

A few problems with ash and the "job control disabled" that don't show
up with bash. I'll try to hammer out some test cases and come up with
something useful. Other than that, great job all round guys..

-- 
Brad....
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