Add example config file and s6 run file.

examples/s6.run

@@ -0,0 +1,6 @@
+#!/bin/execlineb -P
+fdmove -c 2 1
+backtick OLDEXTIP { cat /etc/firewall/tmp/OLDEXTIP }
+importas OLDEXTIP OLDEXTIP
+/sbin/ndhc -c /etc/ndhc/wan0.conf -r $OLDEXTIP
+

examples/wan0.conf

@@ -0,0 +1,17 @@
+user = ndhc
+ifch-user = ndhc-ifch
+sockd-user = ndhc-sockd
+chroot = /var/lib/ndhc
+state-dir = /etc/ndhc
+interface = wan0
+now = true
+hostname = EXAMPLE-HOST
+clientid = aa:bb:cc:dd:ee:ff
+relentless-defense = true
+s6-notify = 3
+arp-probe-wait = 50
+arp-probe-num = 3
+arp-probe-min = 50
+arp-probe-max = 100
+script-file = /sbin/fw-wan0-ipchange
+