update network service examples

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

examples/var_service/zcip_if/finish

@@ -0,0 +1,13 @@
+#!/bin/sh
+# executed when service is taken down ("sv d .")
+
+service=${PWD##*/}
+file_ipconf="$service.ipconf"
+dir_ipconf="/var/run/service/fw"
+
+# Reconfigure network with this interface disabled
+echo "Finish: deconfiguring"
+rm "env.out"
+rm "$file_ipconf"
+rm "$dir_ipconf/$file_ipconf"
+sv u /var/service/fw