[9636] Move item real-time/in-game duration counting flag to new extraflags field.

[newsbot]

m sql/mangos.sql

+ sql/updates/9636_01_mangos_item_template.sql

m sql/updates/Makefile.am

m src/game/Item.cpp

m src/game/ItemHandler.cpp

m src/game/ItemPrototype.h

m src/game/ObjectMgr.cpp

m src/game/Player.cpp

m src/game/Spell.cpp

m src/shared/revision_nr.h

m src/shared/revision_sql.h



[9636] Move item real-time/in-game duration counting flag to new extraflags field.



Client expected only positive duration values, so stop use duration field as signed.

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