Brad Fitzpatrick e3bcb2ec83 ipn/ipnlocal: use context.CancelFunc type for doc clarity
Using context.CancelFunc as the type (instead of func()) answers
questions like whether it's okay to call it multiple times, whether
it blocks, etc. And that's the type it actually is in this case.

Updates #cleanup

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-03 08:59:53 -08:00
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