Merge pull request #32 from robhoes/ea1254

Get network stats through netlink rather than from /proc
CA-137227: Checking xen-backend in link of /sys/class/net/*/device/driver to identify vifs

Signed-off-by: Ravi Pandey <ravi.pandey@citrix.com>
Merge pull request #33 from ravippandey/CA-137227

CA-137227: Checking xen-backend in link of /sys/class/net/*/device/driver to identify vifs
Don't let naughty dhcp servers trick us into setting default routes.

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Merge pull request #34 from jonludlam/CA-137892

Don't let naughty dhcp servers trick us into setting default routes.
Don't record RRDs for the "ovs-system" interface

This started appearing in the recent single-datapath OVSes, but does not really
add anything useful.

Signed-off-by: Rob Hoes <rob.hoes@citrix.com>