xl: Update example xl.conf with correct name for default script option

We've changed the config option from "vifscript" to "vif.default.script".  This
was changed in the manpage but not in the example xl.conf.

Also move the option down to be with the other vif options.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/examples/xl.conf

@@ -8,9 +8,6 @@
 # full path of the lockfile used by xl during domain creation
 #lockfile="/var/lock/xl"
 
-# default vif script 
-#vifscript="vif-bridge"
-
 # default output format used by "xl list -l"
 #output_format="json"
 
@@ -25,6 +22,9 @@
 # default gateway device to use with vif-route hotplug script
 #vif.default.gatewaydev="eth0"
 
+# default vif script to use if none is specified in the guest config
+#vif.default.script="vif-bridge"
+
 # default bridge device to use with vif-bridge hotplug scripts
 #vif.default.bridge="xenbr0"