metadata on softraid

[Marco Peereboom <slash@xxxxxxxxxxxx>]

Ok folks I just noticed that I forgot to add some entries to the
metadata so that I can deal with restartable rebuilds.  So don't get too
attached to V2 of the metadata; I will soon commit a V3 that will
slightly modify it to incorporate it.  This should be only a couple of
days so don't put anything critical on those volumes just yet.

Sorry for the inconvenience.

/marco