ibnay

For faster merge, I thing we can continue using your branch, and you can continue change 3 line of code (can see compare in my `fork`) using this [https://github.com/avlahop/dask-elk/compare/bug/26/no_node_lookup_when_wan_only...ibnbay99:bug/26/no_node_lookup_when_wan_only](https://github.com/avlahop/dask-elk/compare/bug/26/no_node_lookup_when_wan_only...ibnbay99:bug/26/no_node_lookup_when_wan_only) What...

Yes it work, like last image I posted. I confuse to write a test for option `wan_only` is true. I just added doc for part `wan_only` you comment on git...