Re: kern/41668: MONOLITHIC should probably also be included in HEAD builds

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

> The monolithic kernel an aid for people developing core kernel code,
> compiling their own kernels, and generally playing about in areas where one
> can shoot oneself in the foot rather easily.  I have never had the need for
> it but I can see the utility.

Agreed.

We need some mechanism for "-current only" targets in src/distrib,
like motd(5) message in BETA/RC, because many developers often say
"try the latest -current" to ordinary users.
Probably a module set proposed long ago should also be there.

Anyway, this PR should belong to install, not kern.
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Izumi Tsutsui