ipython/ipython — pull request #6629 by minrk (2014-10-05 19:51:59+00:00)
Title: remove on_first_message authentication

in ZMQStreams.

- use regular cookie auth
- use url param for session id

No need for weird, special first message.

I know cookies didn't used to work in websockets in Tornado. This may have been a limitation of tornado < 3.