> My inclination is that it is wrong [...]
It looks strange to me, but that doesn't tell much.
Could it have been added as a quick fix for the behaviour of some (then) 
standard daemon or the like?

> The logic was added to 4.4 by Kirk McKusick but without much in the
> way of rationale:
Perhaps the easiest thing would be someone asking Kirk Himself whether 
he can remember?

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