generate a unique MAC

gluon/gluon-mesh-batman-adv-core/files/lib/gluon/upgrade/mesh-batman-adv-core/initial/010-mesh-on-lan

@@ -1,6 +1,7 @@
 #!/usr/bin/lua
 
 local site = require 'gluon.site_config'
+local util = require 'gluon.util'
 local sysconfig = require 'gluon.sysconfig'
 local uci = require 'luci.model.uci'
 
@@ -8,10 +9,11 @@ local c = uci.cursor()
 
 if sysconfig.lan_ifname then
   c:section('network', 'interface', 'mesh_lan',
-            { ifname = sysconfig.lan_ifname
-            , proto  = 'batadv'
-            , mesh   = 'bat0'
-            , auto   = site.mesh_on_lan and 1 or 0
+            { ifname  = sysconfig.lan_ifname
+            , proto   = 'batadv'
+            , mesh    = 'bat0'
+            , macaddr = util.generate_mac(1, 1)
+            , auto    = site.mesh_on_lan and 1 or 0
             })
 
   c:save('network')