* Previous fix to this failed to account for open_url returning a filehandle
Fixes the bugs introduced by c6fb355
* read() from HTTPError for python-3.6+
HTTPError is funny. It contains a filehandle to read the response from
and also makes it available via a read() method. On earlier versions of
python (2 and 3) the read() method was enough to make it work with
json.load(). The newer version of json.load() needs a more complete
file interface than this and has stopped working. Read the bytes,
transform to str and pass it in manually to fix it.
1786c81a65