Harry Harpham ac74d28190
ipn/ipnlocal: add validations when setting serve config (#17950)
These validations were previously performed in the CLI frontend. There
are two motivations for moving these to the local backend:
1. The backend controls synchronization around the relevant state, so
   only the backend can guarantee many of these validations.
2. Doing these validations in the back-end avoids the need to repeat
   them across every frontend (e.g. the CLI and tsnet).

Updates tailscale/corp#27200

Signed-off-by: Harry Harpham <harry@tailscale.com>
2025-11-20 13:40:05 -06:00
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