[10829] Update SpellFamily check functions.

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автор: VladimirMangos


<pre>m sql/mangos_spell_check.sql
m src/game/DBCEnums.h
m src/game/DBCStructure.h
m src/game/SpellEffects.cpp
m src/game/SpellMgr.h
m src/game/Unit.cpp
m src/game/Unit.h
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[10829] Update SpellFamily check functions.

* Move SPELLFAMILY_* to DBCEnums.h and name it as SpellFamily
* Use enum in Unit::GetAura, move family mask code to new SpellEntry helper function.
* Avoid all auras scan in search of triggred spell for 20243.</pre>




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