allow the IP pool to be set when adding/editing a server

app/controllers/servers_controller.rb

@@ -84,7 +84,7 @@ class ServersController < ApplicationController
   private
 
   def safe_params(*extras)
-    params.require(:server).permit(:name, :mode, *extras)
+    params.require(:server).permit(:name, :mode, :ip_pool_id, *extras)
   end
 
 end