[11557] Duel related fixes

[newsbot]

автор: VladimirMangos


<pre>m src/game/DBCEnums.h
m src/game/Player.cpp
m src/game/Player.h
m src/game/Spell.cpp
m src/game/SpellEffects.cpp
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'>[11557] Duel related fixes

* Implement duel allowed check base at proper area flag AREA_FLAG_DUEL (0x00000040)
This allow duels for example in capital area 4570 and allow/fogbid correctly some other zones and areas.
* Implement duel cancel at leave duel allowed area
* Fixed code for duels work in sunctuary if area allow duels.</pre>




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