Core/Threat: Fix by faq.

Turning gm on, now drops threat.
Dead mobs no longer holds threat on player.
Also fixed some Engrish.

src/server/game/Combat/ThreatManager.cpp

@@ -535,6 +535,10 @@ void ThreatManager::processThreatEvent(ThreatRefStatusChangeEvent* threatRefStat
                     setCurrentVictim(NULL);
                     setDirty(true);
                 }
+                if (getOwner() && getOwner()->IsInWorld())
+                    if (Unit* target = ObjectAccessor::GetUnit(*getOwner(), hostilRef->getUnitGuid()))
+                        if (getOwner()->IsInMap(target))
+                            getOwner()->SendRemoveFromThreatListOpcode(hostilRef);
                 iThreatContainer.remove(hostilRef);
                 iThreatOfflineContainer.addReference(hostilRef);
             }

src/server/game/Entities/Creature/Creature.cpp

@@ -468,9 +468,9 @@ void Creature::Update(uint32 diff)
 
     switch (m_deathState)
     {
-        case JUST_ALIVED:
-            // Must not be called, see Creature::setDeathState JUST_ALIVED -> ALIVE promoting.
-            sLog->outError("Creature (GUID: %u Entry: %u) in wrong state: JUST_ALIVED (4)", GetGUIDLow(), GetEntry());
+        case JUST_RESPAWNED:
+            // Must not be called, see Creature::setDeathState JUST_RESPAWNED -> ALIVE promoting.
+            sLog->outError("Creature (GUID: %u Entry: %u) in wrong state: JUST_RESPAWNED (4)", GetGUIDLow(), GetEntry());
             break;
         case JUST_DIED:
             // Must not be called, see Creature::setDeathState JUST_DIED -> CORPSE promoting.
@@ -1555,7 +1555,7 @@ void Creature::setDeathState(DeathState s)
 
         Unit::setDeathState(CORPSE);
     }
-    else if (s == JUST_ALIVED)
+    else if (s == JUST_RESPAWNED)
     {
         //if (isPet())
         //    setActive(true);
@@ -1611,7 +1611,7 @@ void Creature::Respawn(bool force)
         CreatureTemplate const* cinfo = GetCreatureTemplate();
         SelectLevel(cinfo);
 
-        setDeathState(JUST_ALIVED);
+        setDeathState(JUST_RESPAWNED);
 
         uint32 displayID = GetNativeDisplayId();
         CreatureModelInfo const* minfo = sObjectMgr->GetCreatureModelRandomGender(&displayID);

src/server/game/Entities/Unit/Unit.cpp

@@ -12823,9 +12823,8 @@ void Unit::setDeathState(DeathState s)
 {
     // death state needs to be updated before RemoveAllAurasOnDeath() calls HandleChannelDeathItem(..) so that
     // it can be used to check creation of death items (such as soul shards).
-    m_deathState = s;
 
-    if (s != ALIVE && s != JUST_ALIVED)
+    if (s != ALIVE && s != JUST_RESPAWNED)
     {
         CombatStop();
         DeleteThreatList();
@@ -12868,8 +12867,12 @@ void Unit::setDeathState(DeathState s)
         if (ZoneScript* zoneScript = GetZoneScript() ? GetZoneScript() : (ZoneScript*)GetInstanceScript())
             zoneScript->OnUnitDeath(this);
     }
-    else if (s == JUST_ALIVED)
+    else if (s == JUST_RESPAWNED)
+    {
         RemoveFlag (UNIT_FIELD_FLAGS, UNIT_FLAG_SKINNABLE); // clear skinnable for creature and player (at battleground)
+    }
+
+    m_deathState = s;
 }
 
 /*########################################

src/server/game/Entities/Unit/Unit.h

@@ -465,7 +465,7 @@ enum DeathState
     JUST_DIED   = 1,
     CORPSE      = 2,
     DEAD        = 3,
-    JUST_ALIVED = 4,
+    JUST_RESPAWNED = 4,
 };
 
 enum UnitState