Added quests_niflheim.txt to the config file

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@7347 54d463be-8e91-2dee-dedb-b68131a5f0ec

npc/scripts_athena.conf

@@ -73,6 +73,7 @@ npc: npc/quests/quests_geffen.txt
 npc: npc/quests/quests_lighthalzen.txt
 npc: npc/quests/quests_lutie.txt
 npc: npc/quests/quests_morocc.txt
+npc: npc/quests/quests_niflheim.txt
 npc: npc/quests/quests_payon.txt
 npc: npc/quests/quests_prontera.txt
 npc: npc/quests/quests_umbala.txt