[Gluster-devel] Health output like mdstat

[Gandalf Corvotempesta]

I think would be useful to add a cumulative cluster health output like
mdstat for mdadm.
So that with a simple command, would be possible to see:

1) how many nodes are UP and DOWN (and which nodes are DOWN)
2) any background operation running (like healing, scrubbing) with
their progress
3) any split brain files that won't be fixed automatically

Currently, we need to run multiple commands to see cluster health.

An even better version would be something similiar to "mdadm --detail /dev/md0"