Add elevation message to ports UI

[alexr00]

This change allows remote extension to handle elevation if they want.
Fixes microsoft/vscode-remote-release#3922

[SamuelMoraesF]

Is there anything that I need do to get this working? I'm currently using vscode insiders and I still can't forward lower ports (like 80 and 443).

[alexr00]

@SamuelMoraesF This change just added an option for Remote extensions to support using privileged ports. There are currently no Remote extensions that have done the necessary implementation to add this support. Which remote extension are you using?

[jfeliciani]

@alexr00 I have the same problem currently and really need this feature. I am currently using the Microsoft Remote - SSH extension. https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-ssh

[SamuelMoraesF]

@alexr00 I'm using docker containers (ms-vscode-remote.remote-containers)

[alexr00]

@chrmarti and @roblourens FYI there are requests to use privileged local ports when doing port forwarding in remote containers. To accomplish this, you would need to implement a tunnelFactory in each extension that knows how to elevate. Maybe this is an argument that would should support this in the core.

[chrmarti]

@alexr00 When the resolver does not have a tunnel factory, could the core implement elevation? Maybe there is also a way to share that with the tunnel factory if there is one. (Remote-Containers currently does not have a tunnel factory.)

[alexr00]

That should be possible. Feature request: microsoft/vscode-remote-release#4589