Constant gnunet_sys::GNUNET_MQ_PreferenceKind_GNUNET_MQ_PREFERENCE_LATENCY

pub const GNUNET_MQ_PreferenceKind_GNUNET_MQ_PREFERENCE_LATENCY: GNUNET_MQ_PreferenceKind = 2;

The preferred transmission for this envelope foces on minimizing latency.