DB/SAI: Azuremyst Isle Scripts

Script Turn in events for 

* Medicinal Purpose
* An Alternative Alternative
* Rune Covered Tablet

Script repeating event for "Cookie" McWeaksauce
DB/Misc: Fix some startup errors
DB/Waypoints: Pathing for Murkblood Invaders in Nagrand
Core/Network: Allow storing any packet types in Socket write queue to reduce the amount of copying going on
DB/Misc: Fix some spell area issues

Add spell area entries so some spells get removed when players leaves zone where its intended to be used: -

Closes #12669

Also fixes imbued scourge shroud http://www.wowhead.com/item=34782/imbued-scourge-shroud so the aura gets removed when player leaves the Temple City of En'kilah.
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore