unicode errors in logs

[ara4n]

Unhandled Error
Traceback (most recent call last):
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/protocols/basic.py", line 571, in dataReceived
    why = self.lineReceived(line)
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/web/http.py", line 1656, in lineReceived
    self.allContentReceived()
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/web/http.py", line 1731, in allContentReceived
    req.requestReceived(command, path, version)
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/web/http.py", line 827, in requestReceived
    self.process()
--- <exception caught here> ---
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/web/server.py", line 189, in process
    self.render(resrc)
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/web/server.py", line 238, in render
    body = resrc.render(self)
  File "/home/vectoris/venv-sydent/local/lib/python2.7/site-packages/twisted/web/resource.py", line 250, in render
    return m(request)
  File "sydent/http/servlets/lookupservlet.py", line 42, in render_GET
    sgassoc = globalAssocStore.signedAssociationStringForThreepid(medium, address)
  File "sydent/db/threepid_associations.py", line 73, in signedAssociationStringForThreepid
    (medium, address, time_msec(), time_msec()))
sqlite3.ProgrammingError: You must not use 8-bit bytestrings unless you use a text_factory that can interpret 8-bit bytestrings (like text_factory = str). It is highly recommended that you instead just switch your application to Unicode strings.

[richvdh]

related: #188

[richvdh]

I strongly suspect this was python2-specific.