rfc: udev should be able to re-exec itself

All,

currently udev does not have a way to restart itself. This would be a
useful feature, because we could then use this command when we upgrade
or downgrade udev on user's systems so that the most current version of
udev is always running.

One of gentoo's developers did suggest a patch quite a while back, but
some how it got lost in the shuffel. This patch will not apply now, but
it gives the impression that something like this could be added very
easily [1].

Thoughts anyone?

Thanks,

William

[1] https://bugs.gentoo.org/show_bug.cgi?id=129204#c7

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