Incompatibility with gunicorn ssl (and quick fix)

[Danny Goodman]

It turns out that both gunicorn and socketio specify the "do_handshake_on_connect" keyword in config, so an error is thrown when using ssl:

            if self.cfg.is_ssl:      # sgunicorn.py line 57 version 0.3.6

                ssl_args = dict(

                    server_side=True,

                    do_handshake_on_connect=False,

                    **self.cfg.ssl_options

                )   ## This causes: TypeError: type object got multiple values for keyword argument 'do_handshake_on_connect'

This can be easily fixed, eg:

                ssl_args = dict(

                    server_side=True,

                    do_handshake_on_connect=False

                )

                ssl_args.update(self.cfg.ssl_options)

Thoughts?