Core/Objects: Added missing data convertion for `playercreateinfo_spell_custom`.
Fixed a duplicate ALTER query, it was already in the previous SQL file.
Rename sql files
Core/Vehicles

* Fixed crash happening when passenger died on vehicle he was
controlling
* Fixed crash happening if vehicle control aura was removed before
passenger is fully added to vehicle
DB/Quests: Fix The Best of Intentions

Remove a bunch of incorrectly spawned NPCs and add some missing NPCs and
GOs for quest Defiling the Defilers.
Script/Spell: Unlocking Zuluhed's Chains
DB/Loot: Correct Lootmode for some questitems (thx redsonja as well)
DB/SAI fix some event_flags and other conversion issues
Core/Vehicles: Fixed a crash introduced in
DB/Spells: Fixed startup errors related to playercreateinfo_spell, an…

…d prevent logging spam when race mask or class mask 0 is used.
Scripts/Pit of Saron: Very minor spelling error correction.
DB/Spells: Corrected playercreateinfo_spell records *for good*.

Also corrected load count and temporarily removed an error log. It needs
better troubleshooting to avoid error'ing false positives.
Allow reply to whispers if you are under CONFIG_CHAT_WHISPER_LEVEL_RE…

…Q, and implement feature for GMs to remove single players from their
WhisperWhiteList.
Remove documentation for script/custom texts

The related code and tables do not exist anymore.
Fix some engrish
Core/Unit: Fall after exiting vehicle if is in air and can not fly
Script/Quest: Into the wild green Yonder

Still todo:
* Fix spell focus requirement for the drop spell casted by the vehicle
SQL: Rename SQL file after PR merge
Core: Fix non pch build
Scripts/Commands: Fix "cannot pass objects of non-trivially-copyable …

…type ‘std::string’ through ‘...’"