get_next_kvno
new_mkvno = get_next_kvno(util_context, master_entry);
new_mkey_kvno = get_next_kvno(util_context, master_entry);
new_mkey_kvno = get_next_kvno(context, master_entry);
extern krb5_kvno get_next_kvno(krb5_context, krb5_db_entry *);