Remove a Gossip Script which is already in DB

Remove script for Khadgar all of the gossip menus and options are already in db and this is only a gossip script, will deal with db stuff in next commit
a correction
TrinityIrcChat: initialized local variable 'player_guid'
Core: Fix typo in cec2cc806b418997f387bf1324454b7b76b9f0fa
Core/Misc: Get rid of some warnings.
TrinityIrcChat: fix typo or else..BOOM
Core/Misc: Kill few more warnings.
DB/Misc: Random fixes/error fixes
Core/Group: Update enum GroupType
DB/Misc: Couple more fixes

closes #13112
closes #13115
Scripts/CoS: implemented Infinite Corruptor, improvements in instance script and Meathook converted to BossAI

Guardian of Time should have some text, but I have not found anything in sniff. Also the whole event needs to be rewritten and improved.
Remove mount vendor cpp script
Merge pull request #12927 from MitchesD/misc_3

Scripts/CoS: implemented Infinite Corruptor, improvements in instance sc...
[TW] Revert: Core/Spells: DK Bloodworms Talent

- was fixed in commit
https://github.com/TrueWoW/TrinityCore/commit/479afc0ed04b7161c5460f3e1aed83c4241fd7fc
and this causes to many summons
Merge pull request #69 from gecko32/Patch10

[TW] Revert: Core/Spells: DK Bloodworms Talent
Core/Quests: Only prompt the player to take the next quest in a chain if he meets the conditions for that quest.
Core/Skills: Fix rogue's lock picking

Fixes #12677
Closes #13111
Core/NetworkIO: Set non blocking mode on sockets properly
Core: Fix warning
DB/Gameobject: Allow to target 2 gameobjects

Closes  #13093, closes #13094