New g_part class

[Ivan Voras]

Poul-Henning Kamp wrote:

> Considering the fact that editing can be done equally well in
> userland, what is the rationale or benefit of putting the code into
> the kernel, to deal with very infrequent operations to change the
> disk-layout ?

Hmm, editing partition in userland... isn't there some well known
problem with editing partitions in userland requiring setting
kern.geom.debugflags to 16 before continuing? I might be wrong, but I
think this was one of the problems with geom_gpt?