Add DNS option example to dhcpd.conf

Change-Id: I72cb72d3f1cc17fd983cdc76af5b33237fc8e0c6
diff --git a/trellis/dhcpd.conf b/trellis/dhcpd.conf
index 035c062..f5d338f 100644
--- a/trellis/dhcpd.conf
+++ b/trellis/dhcpd.conf
@@ -3,6 +3,9 @@
 default-lease-time 600;
 max-lease-time 7200;
 
+option domain-name-servers 8.8.8.8, 8.8.4.4;
+option domain-name "trellis.local";
+
 subnet 10.0.2.0 netmask 255.255.255.0 {
   range 10.0.2.100 10.0.2.240;
   option routers 10.0.2.254;