Channel system update:

* Fix bug that player does not have moderator priveliges when ownership was passed on to him after previous owner left the channel.
* Comment out code + alter DB field that are responsible for storing ownerGUID in the database, making it no longer possible for an ex-owner to instantly regain ownership by rejoining the channel as this is not blizzlike.
The code is commented out in case someone wants to make a configurable option out of it.
* Cleanup some other code in affected files.

--HG--
branch : trunk

sql/characters.sql

@@ -274,7 +274,6 @@ DROP TABLE IF EXISTS `channels`;
 CREATE TABLE `channels` (
   `m_name` text NOT NULL,
   `m_team` int(10) unsigned NOT NULL,
-  `m_ownerGUID` int(11) unsigned NOT NULL default '0',
   `m_announce` tinyint(1) unsigned NOT NULL default '0',
   `m_moderate` tinyint(1) unsigned NOT NULL default '0',
   `m_password` text,

sql/updates/5159_characters_channels.sql

@@ -0,0 +1 @@
+ALTER TABLE `channels` DROP `m_ownerGUID`;