Core/SpellScripts: Implemeted SpellScript hook OnDestinationTargetSelect to easier modify SpellDestinations
Scripts/AhnKahet: fix some issues on prince taldaram script
Core/Loot: Fix an exploit with CMSG_LOOT using non-creature guids which would allow you to loot despawned chests in some cases.

By @Kiddie
Core/Chat: Disallow sending CMSG_MESSAGECHAT with CHAT_MSG_SAY, CHAT_MSG_EMOTE or CHAT_MSG_YELL while the sender is not alive.
Also replaced all WorldSession::_player calls by 'sender'

By @TakenBacon
DB/Creature Fix faction of some creatures

By Justiciar, closes #10711
Scripts/Spells: use new hook in some spellscripts
Core/CrashHandler: Add more informations about locals

Log "NULL" for NULL pointers.
Log the correct type instead of <user defined> for pointers and log its fields recursively.
Log locals of all threads.
Log the address if retrieving the value threw an exception.
Increase buffer sizes to avoid buffer overflows.
Scripts: A lots of changes here and there (maybe useless?!?)
Core/Spells: move killing spree to spellscript

Closes #10597
Closes #11468
Fix build
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore
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