glusterd : enable/disable quota using volume set cmd deprecated.

Using the command 'gluster volume set <volname> quota {on|off}'
doesn't really enable/disable quota. So, a message to the user is
provided. Message asks the user to use 'gluster volume
quota <volname> {enable|disable}' instead.

Improvement of the previous method to solve the issue.

Change-Id: Ibeda35bb49ec7b541d53e592b48fd132380fce76
BUG: 1024626
Signed-off-by: Anuradha Talur <atalur@redhat.com>
Reviewed-on: http://review.gluster.org/6512
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
cluster/afr: For entry self heal, mark all source bricks

Problem:
Whenever a new brick is added into a replicate volume, all
source bricks are not marked as source. Only one of them is
marked as source. Here marked as source refers to adding
extended attribute at the backend of a file corresponding to
the newly added brick. As well as source bricks should point
to the newly added brick so that heal can be triggered.

Fix:
All source bricks will now point to newly added bricks and heal
can be triggered based on the extended attributes.

Change-Id: I318e1f779a380c16c448a2d05c0140d8e4647fd4
BUG: 1037501
Signed-off-by: Venkatesh Somyajulu <vsomyaju@redhat.com>
Reviewed-on: http://review.gluster.org/6540
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>