etl config hosts can't end in /

[slifty]

To run the ETL deploy process you need to populate a config.py file. The templates had hostnames that end in / (for https://torque.leverforchange.org/100Change2020/). This has been fixed up by 22ae276

We may, however, want to update the wiki.py script which parses that url so it's more robust. I also noticed that right now the parsing logic takes that entire URL, slices off the schema, and uses the end as the "host" -- in reality there is both a host and a path and it seems like we might as well extract the components.