Required lots of rework since the GOBChannel appeared to be reading
ahead of the data it actually needed. Now using more low-level IO
to send the clientId over to the agent instead.
The server then sends it the protocol version and the client connection info describing whether an agent was found or not. This improves usability for users.
With the --raw option it bypasses this query parameter and wsproxy then works in the old way as a simple stdio-websocket connector. It then still works with converge server but can also be used for simple websocket troubleshooting.
* removed the Async utility
* now using Ping message to webclient for keep alive instaed of actual content
* added remote shell to AgentInfo
* retry of connections to the agent
* better logging for SynchronizeStreams
Protocol version is now checked when the agent connects to the converge server.
Next up: sending connection metadata and username password from server to agent and sending environment information back to the server. This means then that the side channel will only be used for expiry time messages and session type with the client id passed in so the converge server can than correlate the results back to the correct channel.
