Core/Misc: Replace rand() calls with SFMT
DB/Schema: Change playercreateinfo_skills engine to MyISAM
DB/Quest: Fix quest credit for the first trial

By dr-j, closes #12600
DB/Misc: More aditions to 569bfc3

By dr-j, closes #12601
Core/Players: Set fist weapon skill value equal to current unarmed skill when learning fist weapons for the first time
DB/Misc: Vault of Lights

Scripts for Audrid, Tobin, Torian, Omony and Kurzon for the repeating event at the vault of Lights Exodar
Fix my screw up  https://github.com/TrinityCore/TrinityCore/commit/cec1ae4c5b8a46b9bb09eeb6ce8a2db45d48a524

Fix my screwup with https://github.com/TrinityCore/TrinityCore/commit/cec1ae4c5b8a46b9bb09eeb6ce8a2db45d48a524
DB/SAI: Script multiple mobs with SAI

By Malcrom, king of fixes.
Scripts/ICC: fixed Festergut Malleable Goo (thx @ManuFe)

Closes #12023
DB/SAI: Eye of the Lich King 

Properly fix Eye of the Lich King in Pit of Saron so it randomly whispers players
Core/Mains: Handle SIGBREAK to achieve clean shutdown when users click X button on windows