Debug Node: move ws endpoint to not clash with activation endpoints

The Debug node uses /debug as the endpoint for its WebSocket connection.

It also uses /debug/12345/[enable|disable] to toggle the activate state of a debug node.

Having the websocket endpoint beneath the activation endpoints is not ideal, particular when you need to set up a websocket proxy (see discussion in #58 )

We should move the websocket endpoint to /debug/ws to separate it out.

[cliveeisen]

And the equivalent for nginx proxy_set_header Request_method $request_method; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection “upgrade”; proxy_set_header Host $http_host; proxy_set_header X-Real-IP $remote_addr; proxy_pass http://127.0.0.1:50000;

[njh]

Working with the following updated Apache configuration, thanks:

ProxyPreserveHost On
ProxyRequests Off
ProxyPass /nodered/debug/ws ws://localhost:1880/nodered/debug/ws
ProxyPass /nodered http://localhost:1880/nodered
ProxyPassReverse /nodered http://localhost:1880/nodered