Merged requested to merge Seth/ivatar:adapt-old-config into devel
This just adds backward compability with the old configs.
When a literal string is found in the array, it's converted to a dict with just the
url_prefix property to match the start of the URL, which matches the intended behavior in Libravatar before, and still without allowing open redirects.
While I was at it, I also renamed the test variables to make it clear what they were actually testing.
Closes #90 (closed)