site.conf: add ddhcpd settings (for disabled ddhcpd)

site.conf

@@ -55,10 +55,10 @@
     },
   },
   
-  -- ddhcpd = {
-  --   range = "10.187.220.0/22",
-  --   broadcast = "10.187.255.255"
-  -- },
+  ddhcpd = {
+    range = "10.187.220.0/22",
+    broadcast = "10.187.255.255"
+  },
   
   -- Wireless configuration for 2.4 GHz interfaces.
   wifi24 = {