[9849] Implement character database clean up.

[newsbot]

m sql/characters.sql

+ sql/updates/9849_01_characters_saved_variables.sql

m sql/updates/Makefile.am

+ src/game/CharacterDatabaseCleaner.cpp

+ src/game/CharacterDatabaseCleaner.h

m src/game/Makefile.am

m src/game/World.cpp

m src/game/World.h

m src/mangosd/mangosd.conf.dist.in

m src/shared/revision_nr.h

m src/shared/revision_sql.h

m win/VC100/game.vcxproj

m win/VC80/game.vcproj

m win/VC90/game.vcproj



[9849] Implement character database clean up.



This can be disabled by config option.



Flag for clean up can be set for example on client version change.



Signed-off-by: hunuza 

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