Changed table 'im_offline' to use UTF8 characters. This fixes a problem with Offline IM V2 (only relevant to MySQL).

This fixes http://opensimulator.org/mantis/view.php?id=7123

Users that use MySQL should change their MySQL configuration to support UTF8. In the config file /etc/my.cnf (Linux) or my.ini (Windows), add these settings:

   [mysqld]
   character-set-server=utf8

   [client]
   default-character-set=utf8

And then restart MySQL (on Linux: "sudo service mysqld restart").

OpenSim/Data/MySQL/Resources/IM_Store.migrations

@@ -1,4 +1,4 @@
-:VERSION 1         # -------------------------- 
+:VERSION 1         # -------------------------- 
 
 BEGIN;
 
@@ -32,3 +32,11 @@ ALTER TABLE `im_offline`
   ADD KEY `FromID` (`FromID`);
 
 COMMIT;
+
+:VERSION 4         # -------------------------- 
+
+BEGIN;
+
+ALTER TABLE im_offline CONVERT TO CHARACTER SET utf8;
+
+COMMIT;