html5 authentication failure causes error

[Antoine Martin]

Server receives:

Error: unknown or invalid packet type 'suspend'
 received from WebSocket(ws socket: 127.0.0.1:10000 <- 127.0.0.1:50900)

The handler has not been registered yet due to the authentication failure.

[Antoine Martin]

Fixed in r22452. (backport not necessary - this is cosmetic)

We now keep track of whether we're connected or not.
(from the moment we receive the server hello until we close the protocol)