Test connecting using local server to manage connection

[roblourens]

Test #96

• Windows
• MacOS @sandy081
• Linux @jrieken

Complexity: 5

Install the nightly version of the extension (uninstall stable)

• Set "remote.SSH.useLocalServer": true
• Connect to an ssh host with password auth, e.g. https://github.com/microsoft/vscode-internalbacklog/issues/700
• Reload the window
• You should not have to enter your password again
• This works by starting a local server to manage the ssh connection. In the Remote-SSH output channel log you can see Spawned 1234 when the server is started, and in an instance that connected to an already running server, you will see Found running server - short-circuiting install
• Try opening multiple windows, reloading, make sure it works as expected. It's easiest to use password auth so its obvious that something went wrong if you have to enter your password again.
• Close all windows - 3 minutes later, the server process should die.

[jrieken]

@roblourens The remote.SSH.useLocalServer -setting doesn't exists...

[sandy081]

Blocked because of #1269

[roblourens]

It's an undocumented setting at the moment

[roblourens]

It can still be tested with a VM that doesn't require a password, but fixing...

[jrieken]

Confusion... Isn't this item about testing that password prompts only show once? So, when I have a VM that doesn't require a password how do I know that things are in order?

[roblourens]

It's mostly testing that things still just work, but yeah testing the password auth flow is an important part of that. Anyway, the above issue is fixed now.

[roblourens]

And @sbatten you can still hold off on windows testing.

[sbatten]

Please re-assign if this becomes ready

[roblourens]

Not going to publicize it in release notes this month. There are some issues which you guys found, reconnection doesn't work as well as I thought, and windows is still currently a no-go. SSH on windows doesn't report the askpass prompt message. Meaning we can show a password prompt and complete the loop but we can't tell the user what we are asking for - password, key passphrase, 2fa key, etc.