ExtendedFeatures, ///< Extended features
LongMessageTime, ///< Serialize message time as 64-bit
RichMessages, ///< Real Name and Avatar URL in backlog
+ BacklogFilterType, ///< BacklogManager supports filtering backlog by MessageType
#if QT_VERSION >= 0x050500
EcdsaCertfpKeys, ///< ECDSA keys for CertFP in identities
#endif