buildbots (was: eshell-defgroup. Do we really need this?)

[Stephen J. Turnbull]

Ted Zlatanov writes:

 > My point is simple: redundant testing reduces the chance of false
 > positives.  How is anticipating a system failure an argument for never
 > testing?  I can't follow your reasoning, sorry.

Redundant testing also increases the chance of false negatives; those
opposed effects go hand in hand.  I see no reason to suppose that
false positives are more harmful than false negatives at this stage,
quite the reverse, that's all.