Use hostname / IP in a host URLs by default, instead of GUIDs

[kontsevoy]

Intro

Currently Teleport can open a web-based terminal for any node using the following URL format:

https://proxy.example.com:3080/web/cluster/:cluster_name/node/:node_id/:user

node_id can be one of [node_uuid, hostname, node_ip] basically anything a node can be addressed by.

Current behavior

The web UI generates these URLs using node GUIDs. They aren't intuitive for users who wish to use their own.

Suggestion

Use hostname instead.

[klizhentas]

would be also nice to have a way to get a "shareable link" by clicking on some button/icon alongside the list of teleport servers, just like for google docs.

[kontsevoy]

@klizhentas right clicking on any link in any browser gives you "copy URL" menu item. Apps that re-implement this do it because they break conventions and do not have reusable links by default (usually due to rich client-side context). Luckily Teleport UI doesn't have this problem, just like any properly done web app (do you see a "shareable link" button for every Github issue? no, you just rick-click and get it)

Oh, and copy-pasting a URL from a browser URL bar works too, since the 90s :)