Allow proxy bypass

[ax-jmckenzie]

• Add option to bypass the built-in web socket proxy and connect directly to the provided host/port, which would need to itself be a web socket.
• This is useful for anyone who has their own proxy solution in place already
• Also adds a parameter to the 'init' function to allow the fingerprint verification step to be bypassed

[hullarb]

Hi James,

Thank you very much for opening this PR. I like the idea of supporting direct connections. Have you modified the proxy server to accept the direct connection requests? would you mind sharing the code for that too, it would help to test this feature.

[ax-jmckenzie]

Hi Bela, I haven't modified the proxy server but the way I tested this was as follows:

• Start an SSH server on a remote device (or even your own local device)
• Run websockify (https://github.com/novnc/websockify or https://github.com/novnc/websockify-js) on the same device as the SSH server and have it create a websocket that proxies to the SSH server
• Do not run the ssheasy proxy server at all
• Now populate the IP / host + port that websockify opened up into host/port values within the ssheasy form and check the 'Bypass proxy' checkbox
• Add your credentials and try to connect