Updates some enums

Port From (https://github.com/TrinityCore/TrinityCore)

Source/Framework/Constants/CreatureConst.cs

@@ -42,14 +42,14 @@ namespace Framework.Constants
         RareElite = 2,
         WorldBoss = 3,
         Rare = 4,
-        Unknown = 5                      // found in 2.2.3 for 2 mobs
+        EliteTrivial = 5                      // found in 2.2.3 for 2 mobs
     }
 
     [Flags]
     public enum UnitFlags : uint
     {
         ServerControlled = 0x01,
-        NonAttackable = 0x02,
+        NonAttackable = 0x02, // not attackable, set when creature starts to cast spells with SPELL_EFFECT_SPAWN and cast time, removed when spell hits caster, original name is UNIT_FLAG_SPAWNING. Rename when it will be removed from all scripts
         RemoveClientControl = 0x04, // This is a legacy flag used to disable movement player's movement while controlling other units, SMSG_CLIENT_CONTROL replaces this functionality clientside now. CONFUSED and FLEEING flags have the same effect on client movement asDISABLE_MOVE_CONTROL in addition to preventing spell casts/autoattack (they all allow climbing steeper hills and emotes while moving)
         PlayerControlled = 0x08, //controlled by player, use _IMMUNE_TO_PC instead of _IMMUNE_TO_NPC
         Rename = 0x10,
@@ -60,7 +60,7 @@ namespace Framework.Constants
         ImmuneToNpc = 0x200,
         Looting = 0x400,
         PetInCombat = 0x800,
-        Pvp = 0x1000,
+        PvpEnabling = 0x1000,
         Silenced = 0x2000,
         CantSwim = 0x4000,
         CanSwim = 0x8000, // shows swim animation in water
@@ -68,7 +68,7 @@ namespace Framework.Constants
         Pacified = 0x20000,
         Stunned = 0x40000,
         InCombat = 0x80000,
-        TaxiFlight = 0x100000,
+        OnTaxi = 0x100000,
         Disarmed = 0x200000,
         Confused = 0x400000,
         Fleeing = 0x800000,