Core/Spells: Fix Bloodworms summon count
DB/Spells: Added missing sql in 479afc0ed04b7161c5460f3e1aed83c4241fd7fc
DB/Quest: The Chain Gun and You

Script by me, closes #1867
Core/Shared: Fix world and auth crash on shutdown (PCQ & DbWorker)

Fixes #12704
Core/Server: Add mutex lock to PacketLog
Merge pull request #2 from TrinityCore/master

pull