Re: Towards __deprecated in cdefs.h

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Warner Losh writes:

> So before I spend a ton of time on implementing the various options, I
> thought I'd poll on arch@ to see if there's agreement that [4] is likely
> best, and if not, which other option I should put my weight behind.

We have a history of warning that something will be removed, and
then not remembering to do so until much later, so I think we should
also have a grep-able "when" argument which can be surveyed during
the run-up to a release.

Maybe something like:

	__deprecated_msg(16, "foobar() is going away, use snafu() instead")

With suitable macro-magic, that can also be used to run ports-surveys
and other tests in a "pretend this is RELENG16" mode.

If you want a word distinct from "deprecated" you could use "retired" ?

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