sysctl_proc calls handler twice

[Poul-Henning Kamp]

In message <20050816221033.C47830 at delplex.bde.org>, Bruce Evans writes:

>     Only the last 2 of these calls reach the handler.  Proc handlers are
>     only special here in that they are more specialized than the integer
>     handlers.

Strictly speaking it is the other way arond: since integer handlers
are implemented in terms of proc handlers, it follows that proc handlers
cannot be more specialized than integer handlers.

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