update example config file with the new options

TODO

@@ -3,6 +3,5 @@ Things to work on:
  - Offload payout processing to a separate thread (appears not needed, test
    more)
  - Offload RPC requests to a separate thread (appears not needed, test more)
- - Add daemonizing option (for those too lazy to nohup or use tmux/screen)
 
 [//]: # ( vim: set tw=80: )

pool.conf

@@ -13,3 +13,5 @@ log-level = 5
 webui-port = 4243
 disable-self-select = 0
 data-dir = ./data
+pid-file =
+forked = 0