Avery Pennarun 60c00605d3 ipn/setClientStatus: fix inverted prefsChanged check.
We need to emit Prefs when it *has* changed, not when it hasn't.

Test is added in our e2e test, separately.

Fixes: #620

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
2020-07-30 04:52:58 -04:00
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