set kern.cam.scsi_delay to 2000ms on all platforms

[Matthew Jacob]

Absolutely, but let's not lose sight of the fact that timeouts after 
SCSI bus resets have never been an engineered solution, for any OS. 
Going back to 1986 the ANSI specifications have been vague or worse 
about delays after such an action.

I can't speak for Alexander about this, but I suspect all of this is 
going to be "try it, and report failures".

A conservative approach would be "let's not change this", but the reason 
for doing this is to shorten reboot time, which is enough of an 
important issue that it's worth the risk, IMO.

> Sure, but what's the plan for validating it?  Too often this stuff goes into HEAD with the best of intentions, and then it basically never touched again until someone stumbles over it in an release.  I'm not against this change, I just want to know what engineering has gone into it.
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> Scott
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