DB/Misc: Mostly gossip stuff for various creatures.

Some scripts still need to be implemented.
Fixes quest Blood Oath of the Horde.
SQL Fix after 933381f
Merge pull request #9244 from Ascathor/master

SQL Fix after 933381f
Scripts/Spells: Fix Winter Veil PX-238

Ref #9238
Thanks @joschiwald
Core/ObjectMgr: Fix a logic error in GetEquipmentInfo

Thanks @Shauren
Core/Startup: Write current and expected maps version when there's a version mismatch
DB/Spell: Added an auto-kill spell if you go at No Man's Land in Isle of Conquest
Core/SmartAI: Prevent recursive EnterEvadeMode call

Ref #8679
Core/Scripts: Removed useless const modifier on method parameters accepting primitive types passed by value