Add authentication failure reason in ConnectionEvent

    HLF_UNWANTED = 4;

  }

  // Level 2 failure reason.

  enum Level2FailureReason {

    // Unknown default

    FAILURE_REASON_UNKNOWN = 0;

    // The reason code if there is no error during authentication. It could

    // also imply that there no authentication in progress.

    AUTH_FAILURE_NONE = 1;

    // The reason code if there was a timeout authenticating.

    AUTH_FAILURE_TIMEOUT = 2;

    // The reason code if there was a wrong password while authenticating.

    AUTH_FAILURE_WRONG_PSWD = 3;

    // The reason code if there was EAP failure while authenticating.

    AUTH_FAILURE_EAP_FAILURE = 4;

  }

  // Entity that recommended connecting to this network.

  enum ConnectionNominator {

    // Unknown nominator

  // The currently running network selector when this connection event occurred.

  optional int32 network_selector_experiment_id = 12;

  // Breakdown of level_2_failure_code with more detailed reason.

  optional Level2FailureReason level_2_failure_reason = 13

          [default = FAILURE_REASON_UNKNOWN];

}

// Number of occurrences of a specific RSSI poll rssi value