9.29: now that linking protocol messages are parsed properly, IPv6 address can no longer begin with ASCII colon (:).
            the safe_ip() utility was created to prepend one ASCII zero (0) to IPs starting with the ASCII colon (:).
            added EUID TS6 server command handler.
            added TS6 utilities:
            ts6_id_n:           get the Nth ID in TS6 format;
            sid_from_ts6:       convert TS6 SID to juno SID;
            uid_from_ts6:       convert TS6 UID to juno UID;
            uid_u_from_ts6:     convert the "ID" portion of a UID from TS6 to juno ID;
            uid_n_from_ts6:     get the integral value of a TS6 UID.