Add support for character race and faction transfers.

Based (loosely) on patch by Ner'zhul, DarkXuan, and darkshines@sakha.net.
Fixes issue #3429.

--HG--
branch : trunk

sql/updates/9784_world_command.sql

@@ -0,0 +1,4 @@
+DELETE FROM `command` WHERE `name` IN ('character changefaction','character changerace');
+INSERT INTO `command` VALUES
+('character changefaction',2,'Syntax: .character changefaction $name\r\n\r\nChange character faction.'),
+('character changerace',2,'Syntax: .character changerace $name\r\n\r\nChange character race.');