Core/PacketIO: Implemented possibility to ban client addons serverside

sql/updates/characters/2013_04_05_00_characters_banned_addons.sql

@@ -0,0 +1,9 @@
+DROP TABLE IF EXISTS `banned_addons`;
+CREATE TABLE `banned_addons` (
+  `Id` int(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+  `Name` varchar(255) NOT NULL,
+  `Version` varchar(255) NOT NULL DEFAULT '',
+  `Timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  PRIMARY KEY (`Id`),
+  UNIQUE KEY `idx_name_ver` (`Name`, `Version`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;