Fix DriverName for plugin-v2

Print the full plugin-v2 name which might include a registry name.

Also, do not print error from "proxy_addrs".

prog/weaveutil/plugin_network.go

@@ -65,6 +65,7 @@ func isDockerPluginEnabled(args []string) error {
 
 	for _, p := range plugins {
 		if p.Enabled && strings.Contains(p.Name, pluginName) {
+			fmt.Println(p.Name)
 			return nil
 		}
 	}

weave

@@ -1526,7 +1526,7 @@ case "$COMMAND" in
             echo "Invalid 'weave status' sub-command: $SUB_COMMAND" >&2
             usage
         fi
-        if [ -z "$SUB_STATUS" ] && PROXY_ADDRS=$(proxy_addrs) ; then
+        if [ -z "$SUB_STATUS" ] && PROXY_ADDRS=$(proxy_addrs 2>/dev/null) ; then
             echo
             echo "        Service: proxy"
             echo "        Address: $PROXY_ADDRS"
@@ -1535,10 +1535,10 @@ case "$COMMAND" in
             echo
             echo "        Service: plugin (v1)"
             echo "     DriverName: weave"
-        elif [ -z "$SUB_STATUS" ] && is_plugin_v2_enabled ; then
+        elif [ -z "$SUB_STATUS" ] && PLUGIN_FULL_NAME=$(is_plugin_v2_enabled) ; then
             echo
             echo "        Service: plugin (v2)"
-            echo "     DriverName: $PLUGIN_NAME"
+            echo "     DriverName: $PLUGIN_FULL_NAME"
         fi
         [ -n "$SUB_STATUS" ] || echo
         [ $res -eq 0 ]