*Utgarde Pinnacle: Svala fixes - Fix some crashes, complete ritual code and change defines by enums, by Tartalo

*Fix Acherus Flightmaster for Alliance, by MrSmite
*Fix The Party's Over achievement (Prince Taldaram) & Implement Good Grief achievement (Maiden of Grief), by Tartalo
*Fix certaint things entering the threat list and never leaving, bugging mob's HP regeneration (ie: Priest's Lightwell).. again. Thanks Gyullo.

--HG--
branch : trunk

src/game/CreatureAI.cpp

@@ -93,12 +93,13 @@ void CreatureAI::DoZoneInCombat(Creature* creature)
                 creature->AddThreat(pPlayer, 0.0f);
             }
 
+            /* Causes certain things to never leave the threat list (Priest Lightwell, etc):
             for(Unit::ControlList::const_iterator itr = pPlayer->m_Controlled.begin(); itr != pPlayer->m_Controlled.end(); ++itr)
             {
                 creature->SetInCombatWith(*itr);
                 (*itr)->SetInCombatWith(creature);
                 creature->AddThreat(*itr, 0.0f);
-            }
+            }*/
         }
     }
 }

src/game/ObjectMgr.cpp

@@ -5284,6 +5284,15 @@ uint32 ObjectMgr::GetTaxiMountDisplayId( uint32 id, uint32 team, bool allowed_al
         else
             mount_entry = node->MountCreatureID[0];
 
+    	// Fix for Alliance not being able to use Acherus taxi
+    	// only one mount type for both sides
+    	if (mount_entry == 0 && allowed_alt_team)
+    	{
+    		// Simply reverse the selection. At least one team in theory should
+    		//  have a valid mount ID to choose
+    		mount_entry = (team == ALLIANCE) ? node->MountCreatureID[0] : node->MountCreatureID[1];
+    	}
+
         CreatureInfo const *mount_info = GetCreatureTemplate(mount_entry);
         if (mount_info)
         {

src/game/Player.cpp

@@ -17965,7 +17965,12 @@ bool Player::ActivateTaxiPathTo(std::vector<uint32> const& nodes, Creature* npc
     }
 
     // get mount model (in case non taximaster (npc==NULL) allow more wide lookup)
-    uint32 mount_display_id = objmgr.GetTaxiMountDisplayId(sourcenode, GetTeam(), npc == NULL);
+    //
+    // Hack-Fix for Alliance not being able to use Acherus taxi. There is
+    // only one mount ID for both sides. Probably not good to use 315 in case DBC nodes
+    // change but I couldn't find a suitable alternative. OK to use class because only DK
+    // can use this taxi.
+    uint32 mount_display_id = objmgr.GetTaxiMountDisplayId(sourcenode, GetTeam(), npc == NULL || (sourcenode == 315 && getClass() == CLASS_DEATH_KNIGHT));
 
     // in spell case allow 0 model
     if ((mount_display_id == 0 && spellid == 0) || sourcepath == 0)