Nohub can not connect via web browser

[jonandrewdavis]

The .gd client, when exported for web, fails to connect to an existing nohub server.

To reproduce in the web (itch):

• Visit https://jonandrewitchio.itch.io/friendgem
• Try to connect to foxssake.studio:12980

To reproduce in a local project:

• Export the project as HTML5, web to a folder like /dist as index.html
• Save the official godot web server for local serve:
  • https://github.com/godotengine/godot/blob/master/platform/web/serve.py
• Run it like: python3 serve.py --root './dist/
• Observe that the client fails to make a connection, even with a nohub server you know is there, if it's running in a browser
• Also an issue when hosting on itch.io

Note: Creating this issue mostly for awareness, not really an expected use case. If it does work, then itch.io could host the nobub .gd client: https://jonandrewitchio.itch.io/friendgem