9.24: added TS6 outgoing command SID.
            began implementing network burst for TS6.
            TS6 prefixes are mapped to definitions in default.conf.
            show multiple prefixes in EUID, not just the highest.
            added channel method ->get_user_levels().
            added TS6 utilities:
            ts6_id:         convert an object to its TS6 ID;
            ts6_sid:        convert a juno SID to a TS6 SID;
            ts6_uid:        convert a juno UID to a TS6 UID;
            ts6_uid_u:      convert the "ID" portion of UID to TS6 ID;
            ts6_prefix:     convert juno status level to TS6 prefix;
            ts6_prefixes:   convert juno status levels to TS6 prefixes without duplicates.