XReflectorPlus
 DExtra secure reflector system of D-STAR Russia network based on code of KI4LKF
 Copyright 2012-2013 by Artem Prilutskiy, R3ABM (r3abm-at-dstar.su)
 Features:
 - automatic access control of operators based on ircDDB's callsign data
 - authorization of repeaters and nodes by IP based on data of ircDDB logons
 - Hot-Spot authorization controlled via self-care portal (not published here)
 - multiple NAT types support for repeaters and Hot-Spots access
 Requirements:
 - MySQL with HandlerSocket plugin
 - libircclient-dev, libconfig-dev, libmysql-dev, hsclient
 Package contents:
 dxrfd-290 - parts of original code of dxrfd 2.90
 dxrfd-290hs - modified version of KI4LKF's dxrfd 2.90. This version uses HandlerSocket to
 access MySQL database.
 dxrfd-311 - full original version of KI4LKF's dxrfd 3.11. This version supports only new
 type of Keep-Alives (10 bytes).
 dxrfd-311dm - modified version of KI4LKF's dxrfd 3.11 (Double Mode). This version supports
 two verions of Keep-Alive messages (9 bytes and 10 bytes). KI4LKF made changes in DExtra
 keep-alive format that is not supported by most software.
 dxrfd-311hs - modified version of KI4LKF's dxrfd 3.11 based on code of dxrfd-311dm.
 This version uses HandlerSocket to access MySQL database.
 CallSync - ircDDB data collector. It is required for authorization feature of XReflectorPlus.
 Software based on code of my BorderGate so it's code quality not best but that works.
 XReflectorPlus.Sql - MySQL / HandlerSocket database for XReflectorPlus
 Data model:
 Global and Local databses (ircDDB data replica)
 Please deploy this schemas from Data/DDB-MySQL.sql
 * Tables - persistent store of ircDDB tables data
 * Users - IRC (ircDDB) user sessions
 * Gateways - materialized view of registered gateways (represented data of Users table)
 XReflectorPlus database
 Please deploay this schema from Data/XReflectorPlus-MySQL.sql
 * Spots - self-registered hot-spots
 * Gateways - materialized view of registered gateways (represented data of Users table)
 * Data - Key-Value materialized view for BTREE emulation
 * Remotes - materialized view of Gateways and Spots table, required for dxrfd 3.x and dxrfd 2.90