adding example runit-style service directory

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

examples/var_service/fw/conf/192.168.0.1.ipconf

@@ -0,0 +1,11 @@
+#!/bin/sh
+# A small network with no routers
+# (maybe *we* are their router)
+#
+let cfg=cfg+1
+if[$cfg]=if
+ip[$cfg]=192.168.0.1
+ipmask[$cfg]=192.168.0.1/24
+### gw[$cfg]=
+### net[$cfg]=0/0
+### dns[$cfg]=''