[9861] Backporting some code chnages from 400 branch.
 

<pre>m src/game/BattleGroundMgr.cpp
m src/game/BattleGroundMgr.h
m src/game/DBCEnums.h
m src/game/DBCStores.cpp
m src/game/DBCStores.h
m src/game/DBCStructure.h
m src/game/ObjectMgr.cpp
m src/game/Opcodes.h
m src/game/Player.cpp
m src/game/Spell.cpp
m src/game/SpellMgr.cpp
m src/game/Unit.cpp
m src/game/Unit.h
m src/shared/Common.cpp
m src/shared/Common.h
m src/shared/Database/DBCFileLoader.cpp
m src/shared/Database/DBCStore.h
m src/shared/revision_nr.h

[9861] Backporting some code chnages from 400 branch.

(based on 400's commit 0f37423)
(based on 400's commit 636cfef)
(based on 400's commit 0bbe3a7)
(based on 400's commit ce86b56)
(based on 400's commit b74c6a8)</pre>



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