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Codescribe
b3c670b17e
When multiple network changes fire in quick succession (e.g., VPN disconnect + interface swap), the second handleRecovery() call cancels the first but inherits stale DoH transports, causing DNS blackouts of up to 30 seconds. Three changes to reduce worst-case recovery from ~30s to <3s: 1. ForceReBootstrap() on recovery entry — closes dead connections and creates fresh transports synchronously before probing, replacing the lazy ReBootstrap() flag that left stale connections for probes to hit. 2. Debounce handleRecovery() for network changes (500ms window) — only the recovery flow is debounced; all other state updates (IP, pf anchor, VPN DNS, tunnel checks) still run immediately on every event. This eliminates the cancel-and-restart race without missing state. 3. Combined effect: ForceReBootstrap closes old in-flight connections (closeTransports) and builds new ones (SetupTransport) atomically, so recovery probes never inherit dead connections from a prior recovery attempt.