Core/Spells: Stormstrike should stack for different casters
Solve issue when 2 enhancement shamans are attacking same target
DB/Conditions: Argent Tournament Champions Daily quest

Proper conditions for champions quests

Battle Before The Citadel, Taking Battle to the Enemy, Among the Champions and Threat from Above require that player is a champion ie has done quest a champion rises
Quests Eadric the Pure / The Scourgebane require that player is a champion
Threat from above has two requirements - That player is a champion and player has completed the black knights orders
The black knights Fall requires that player is a champion, quest chain breaks at the black knights orders if you are not champion
Merge pull request #13007 from mik1893/Stormstrike

Core/Spells: Stormstrike should stack for different casters
Scripts/Commands: Allow to set a custom duration to the Freeze command applied Aura

- Allow to set a default duration for the Freeze Aura in worldserver.conf
- Handle the .freeze and .unfreeze command custom effects through the Freeze AuraScript
- Make players able to eventually unfreeze by themselves since the aura will expire without someone having to use .unfreeze
- Make .freeze command usable with the following syntax:

      * .freeze (with a targeted player)
      * .freeze duration_in_seconds (with a targeted player)
      * .freeze playername duration (if duration is an invalid value it will be defaulted to the config one)
      * .freeze playername (in this case, duration will be defaulted to the config value)

- Make .listfreeze command able to show the remaining freeze duration on all affected players

Closes #12972
Scripts/Onyxia Lair: Some small improvements to GUID storage as it's only used locally
Scripts/Onyxia Lair: Slight change so we don't call Reset() in the 'ctor