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There’s (*LocalBackend).ResetForClientDisconnect, and there’s also (*LocalBackend).resetForProfileChangeLockedOnEntry. Both methods essentially did the same thing but in slightly different ways. For example, resetForProfileChangeLockedOnEntry didn’t reset the control client until (*LocalBackend).Start() was called at the very end and didn’t reset the keyExpired flag, while ResetForClientDisconnect didn’t reinitialize TKA. Since SetCurrentUser can be called with a nil argument to reset the currently connected user and internally calls resetForProfileChangeLockedOnEntry, we can remove ResetForClientDisconnect and let SetCurrentUser and resetForProfileChangeLockedOnEntry handle it. Updates #14823 Signed-off-by: Nick Khyl <nickk@tailscale.com>