Chat → Accounts Relation

File in server/game/Chat	Includes file in server/game/Accounts
Channels / Channel.cpp	AccountMgr.h
Chat.cpp	AccountMgr.h
ChatCommands / ChatCommand.cpp	AccountMgr.h
ChatCommands / ChatCommand.h	RBAC.h
ChatCommands / ChatCommandTags.cpp	AccountMgr.h