[2942] Apply CMaNGOS core update z2757

* Groundwork for channel commands

Command table ".chat" was renamed to ".channel".
This will better reflect purpose of subcommands to be hosted in there.

Collateral changes:
* New command ".channel list" for listing custom channels
* Rename ".chat static" command to ".channel static"
* Move ".channel static" to level 1 (Moderator) access

Updates/2942_z2757_01_mangos_channel_commands.sql

@@ -0,0 +1,27 @@
+ALTER TABLE db_version CHANGE COLUMN required_z2756_01_mangos_new_ticket_system_update required_z2757_01_mangos_channel_commands bit;
+
+LOCK TABLES `command` WRITE;
+/*!40000 ALTER TABLE `command` DISABLE KEYS */;
+DELETE FROM `command` WHERE `name` IN ('chat static', 'channel list', 'channel static');
+INSERT INTO `command` VALUES
+('channel list',1,'Syntax: .channel list [#max] [static]\r\n\r\nShow list of custom channels with amounts of players joined.'),
+('channel static',1,'Syntax: .channel static $channelname on|off\r\n\r\nEnable or disable static mode for a custom channel with name $channelname. Static custom channel upon conversion acquires a set of properties identical to global channes.');
+/*!40000 ALTER TABLE `command` ENABLE KEYS */;
+UNLOCK TABLES;
+
+LOCK TABLES `mangos_string` WRITE;
+/*!40000 ALTER TABLE `mangos_string` DISABLE KEYS */;
+DELETE FROM `mangos_string` WHERE `entry` IN (176, 177, 178, 179, 180, 181, 182, 373, 374, 375);
+INSERT INTO `mangos_string` VALUES
+(176,'Conversion failed: channel \'%s\' has password set',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(177,'Conversion failed: channel \'%s\' is not eligible',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(178,'Conversion succeeded: channel \'%s\' static status is now %s',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(179,'(Static)',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(180,'(Password)',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(181,'There are no matching custom channels at the moment',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(182,'Listing up to %u custom channels matching criterea:',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(373,'UNUSED',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(374,'UNUSED',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL),
+(375,'UNUSED',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
+/*!40000 ALTER TABLE `mangos_string` ENABLE KEYS */;
+UNLOCK TABLES;