Buildsystem: Changed required CMake version to 2.8.9 and removed a check for version we no longer support in msvc settings
Build system: Fix clang build

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Scripts/Icecrown Citadel: Fixed Muradin/Saurfang attacking each other during Gunship Battle

Closes #11786
corrections
corrections...
Merge branch 'master' of git://github.com/TrinityCore/TrinityCore

Conflicts:
	cmake/compiler/msvc/settings.cmake