[Client test 106]: May not be working correctly

[jamietanna]

Changes from #84 may not be working. The followng request fails:

POST https://micropub.rocks/client/tCo18YoObDuFli3L/micropub HTTP/2.0
User-Agent: Go-http-client/2.0
Accept-Encoding: gzip
Content-Length: 276
Content-Type: application/x-www-form-urlencoded
Host: micropub.rocks

access_token=........&
category%5B%5D=bar&
category%5B%5D=baz&
content=foo&
h=entry&
mp-syndicate-to=https%3A%2F%2Fnews.indieweb.org%2Fen&
video=https%3A%2F%2Ffoo

When no Authorization header is sent.