Clean up old (and partially unused) Aggro() function and use EnterCombat() instead + fix some minor enum-typos (INTURRUPT -> INTERRUPT)

(fix by Azazel)

--HG--
branch : trunk

src/server/scripts/EasternKingdoms/wetlands.cpp

@@ -71,7 +71,7 @@ struct npc_tapoke_slim_jahnAI : public npc_escortAI
         }
     }
 
-    void Aggro(Unit* /*pWho*/)
+    void EnterCombat(Unit* /*pWho*/)
     {
         Player* pPlayer = GetPlayerForEscort();