Chat logging implementation and chat service improvements

Signed-off-by: Rogiel <rogiel@rogiel.com>

dist/sql/log_chat.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS `log_chat` (
+  `message_id` int(12) NOT NULL AUTO_INCREMENT,
+  `type` enum('ALL','SHOUT','TELL','PARTY','CLAN','GM','PETITION_PLAYER','PETITION_GM','TRADE','ALLIANCE','ANNOUNCEMENT','BOAT','L2FRIEND','MSNCHAT','PARTYMATCH_ROOM','PARTYROOM_COMMANDER','PARTYROOM_ALL','HERO_VOICE','CRITICAL_ANNOUNCE','SCREEN_ANNOUNCE','BATTLEFIELD','MPCC_ROOM') NOT NULL,
+  `channel_id` int(12) NOT NULL,
+  `sender` int(12) NOT NULL,
+  `date` int(12) NOT NULL,
+  `message` text NOT NULL,
+  PRIMARY KEY (`message_id`)
+) ENGINE=MyISAM;