Merge remote-tracking branch 'upstream/master' into 11_http_interface

weaver/weave

@@ -106,7 +106,7 @@ ip netns exec $NSPID ip link set $GUEST_IFNAME name $CONTAINER_IFNAME
 ip netns exec $NSPID ip addr add $IPADDR dev $CONTAINER_IFNAME
 ip netns exec $NSPID ip link set $CONTAINER_IFNAME up
 
-if [ command -v ethtool >/dev/null 2>&1 ]
+if command -v ethtool >/dev/null 2>&1
 then
     ip netns exec $NSPID ethtool -K $IFACE tx off > /dev/null
 else