Marwan Sulaiman f3a5bfb1b9 cmd/tailscale/cli: add set serve validations
This PR adds validations for the new new funnel/serve
commands under the following rules:
1. There is always a single config for one port (bg or fg).
2. Foreground configs under the same port cannot co-exists (for now).
3. Background configs can change as long as the serve type is the same.

Updates #8489

Signed-off-by: Marwan Sulaiman <marwan@tailscale.com>
2023-09-14 10:22:38 -05:00
..
2023-08-03 13:00:45 -07:00